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← 2026 Week 4

Denver Broncos at San Francisco 49ers

DEN 14 – SF 24 final · Levi's Stadium · DEN 2-1, SF 3-0

How each AI called it

GPT-OSS 120B

OpenAI (open-weight)

Picks San Francisco 49ers · confidence 85% · predicted DEN 17 – SF 31Correct

San Francisco wins thanks to a high‑scoring, balanced offense and better ball security, while Denver struggles with an injured offensive line and limited offensive production.

Full analysis

Denver Broncos

The Broncos are 2‑1 but rank near the bottom in offensive yardage; they rely on Bo Nix and a modest ground game while coping with key line injuries.

Strengths
  • Ability to win close games (30‑26 vs LAR)
  • Bo Nix showed playmaking with 4 TDs
  • Turnover generation (1.3 per game)
Concerns
  • Low offensive production (275 ypg)
  • O‑line injuries hurting QB protection
  • RB depth limited after Jonah Coleman IR
  • Pass rush less effective without Jonathon Cooper
Injuries
  • Marvin Mims Jr. - Out - Reduces WR depth
  • Jonah Coleman - IR - Weakens RB rotation
  • Jonathon Cooper - Out - Decreases LB depth
  • Nick Gargiulo - Out - Undermines interior O‑line protection
  • Frank Crum - IR - Further O‑line depletion
Last game

Beat the Rams 30‑26, producing 257 total yards (179 pass, 78 rush), committing one turnover and modest third‑down success, but relied on a narrow margin.

San Francisco 49ers

The 49ers are 3‑0 with a potent, balanced attack and solid yardage; defensive pass rush is weakened but the unit remains effective overall.

Strengths
  • High-scoring offense (35.5 ppg)
  • Balanced passing and rushing (297 pass, 140 rush yards avg)
  • Strong total yardage (409.5 ypg)
  • Good pass protection (0 sacks in last game)
Concerns
  • Pass rush depleted without Nick Bosa and James Thompson Jr.
  • LB Dre Greenlaw questionable
  • Mike Evans questionable reduces WR depth
Injuries
  • James Thompson Jr. - Out - Reduces interior defensive line depth
  • Nick Bosa - Out - Removes elite edge‑rusher pressure
  • Romello Height - Out - Further DE depth loss
  • Mike Evans - Questionable - Limits receiving options
  • Dre Greenlaw - Questionable - May affect run defense
Last game

Defeated Arizona 36‑30, racking up 437 total yards (297 pass, 140 rush), allowed no sacks and forced a turnover, showing balance and resilience.

Key factors

  • Offensive production gap (high, favors SF) — SF averages over 400 yards per game while DEN is near 275, creating a clear advantage.
  • Defensive line depth (medium, favors SF) — Even without Bosa, 49ers still pressure the QB; Denver's O‑line injuries hurt both protection and run support.
  • Turnover margin (medium, favors SF) — SF has a positive turnover differential (+0.5) versus Denver's negative (-1.3), likely leading to more extra possessions.
What it looked at
  • season offensive/defensive stats
  • injury reports
  • most recent game box scores
  • turnover differentials
  • venue and weather conditions
  • rest and travel

Reasoning

San Francisco's balanced, high‑output offense outpaces Denver's modest yardage and points per game. Even with key pass‑rushers out, the 49ers' defense still limited opponents to 21.5 points and generated a turnover, while Denver's thin offensive line and missing RB hurt their ability to sustain drives. The turnover differential further tilts possession in SF's favor. Combined with equal rest and a warm, grass field that suits both teams, the factors collectively point to a comfortable home win for the 49ers.

Sealed Tue, Sep 29, 6:06 AM EDT · SHA-256 6c9f9b9194a48feb… (this pick cannot be changed)

GLM-5.2

Z.ai (Zhipu)

Picks San Francisco 49ers · confidence 70% · predicted DEN 17 – SF 27Correct

San Francisco wins at home behind a more efficient offense led by Brock Purdy and Christian McCaffrey against a Denver defense missing key personnel. The 49ers' offensive firepower outweighs Nick Bosa's absence given Denver's limited offensive output.

Full analysis

Denver Broncos

2-1 but 0-1 on the road, Denver's offense has been limited to 275 yards per game and the defense is allowing 380+ yards per contest.

Strengths
  • Third-down efficiency was strong in Week 3 at 7-of-13
  • Low penalty count with only 5 for 38 yards last game
  • Bo Nix protected well with just 1 sack taken vs LAR
Concerns
  • Offense averaging only 275 yards per game over the season
  • Defense allowing 380+ yards and 23+ points per game
  • 0-1 on the road with a 31-10 blowout loss at Kansas City
  • Limited rushing output with only 78 yards in Week 3
Injuries
  • Marvin Mims Jr. WR - Out (Foot) - removes a field-stretching option from Nix's arsenal
  • Jonah Coleman RB - IR (Ankle) - further depletes backfield depth behind Dobbins
  • Jonathon Cooper LB - Out (Personal) - weakens linebacker corps vs McCaffrey
  • Nick Gargiulo G - Out (Knee-ACL) - offensive line depth hit
  • Frank Crum OT - IR (Undisclosed) - additional O-line depth concern
Last game

Beat the Rams 30-26 but managed only 257 total yards and 78 on the ground while holding the ball for just over 25 minutes, suggesting the victory was more about opportunism than offensive dominance.

San Francisco 49ers

3-0 and unbeaten at home, the 49ers have been consistently productive on offense and solid enough on defense despite mounting injuries.

Strengths
  • Elite offensive efficiency with Purdy completing 72% of passes for 9 TD to 1 INT
  • Balanced attack with McCaffrey providing 4.7 YPC and red-zone threat
  • Home-field advantage with 2-0 record at Levi's Stadium
Concerns
  • Massive injury list with 18 players on IR/out including edge rusher Bosa
  • Defense gave up 30 points to Arizona in Week 3
  • Penalties have been an issue with 7 for 69 yards last game
Injuries
  • Nick Bosa DE - Out (Calf) - significant loss of edge pressure against mobile Bo Nix
  • James Thompson Jr. DT - Out (Ankle) - depth loss on interior D-line
  • Mike Evans WR - Questionable (Ribs) - could limit receiving options if active
  • Dre Greenlaw LB - Questionable (Quadriceps) - potential loss at second-level tackling vs run
Last game

Beat Arizona 36-30 in a game where they posted 437 total yards and didn't allow a sack, though the defense surrendered 30 points and penalties were problematic.

Key factors

  • Offensive firepower (high, favors SF) — San Francisco averages 35.5 points and 410 yards per game compared to Denver's 20 points and 275 yards per game.
  • Home field (medium, favors SF) — The 49ers are 2-0 at home while Denver is 0-1 on the road, having lost 31-10 at Kansas City.
  • Defensive injuries (medium, favors DEN) — Nick Bosa's absence removes San Francisco's top edge rusher, and Dre Greenlaw's questionable status weakens the second level.
  • Denver offensive limitations (high, favors SF) — Denver has not exceeded 257 yards in a game this season and lost Mims to injury, making it hard to keep pace with SF's scoring.
  • Quarterback play (high, favors SF) — Purdy has 9 TD to 1 INT while completing 72% of passes; Nix has 4 TD to 3 INT with a 60% completion rate.
What it looked at
  • Season scoring and yardage averages for both teams
  • Last game stats showing Denver's 257-yard offensive output vs SF's 437
  • Injury report noting Bosa's absence and Denver's Mims/OL losses
  • Home/road splits favoring San Francisco
  • Quarterback efficiency metrics favoring Purdy
  • Past missed picks where I underestimated underdogs with offensive limitations

Reasoning

San Francisco is the clear pick despite significant defensive injuries. The 49ers' offense has been consistently explosive (35.5 PPG, 409.5 YPG) with Brock Purdy playing at an elite level and Christian McCaffrey providing balance. Denver's offense simply hasn't shown the capacity to keep pace, averaging only 275 yards per game and losing Marvin Mims to injury further limits their weapons. Even without Nick Bosa, the 49ers' defense only needs to be average against a Broncos offense that managed just 257 total yards in its last game. My recent misses have often come from overvaluing teams with offensive limitations, so I'm being cautious here - but Denver's 0-1 road record, 31-10 loss at Kansas City, and the gap in quarterback play make San Francisco the stronger choice at home. The 49ers' ability to score efficiently and Denver's defensive struggles (allowing 380+ yards per game) should result in a comfortable San Francisco win, though Bosa's absence and Denver's third-down efficiency keep this from being a lock.

Sealed Tue, Sep 29, 6:01 AM EDT · SHA-256 c7cbe8cff2dd103e… (this pick cannot be changed)

Nemotron 3 Ultra

NVIDIA

Picks San Francisco 49ers · confidence 78% · predicted DEN 20 – SF 31Correct

San Francisco's explosive offense at home overwhelms a Denver defense that has allowed 380 yards per game, even with Nick Bosa sidelined. The 49ers' balanced attack (Purdy, McCaffrey, Kittle) matches up perfectly against a Broncos unit missing starting OL depth and a top cornerback in the secondary.

Full analysis

Denver Broncos

Denver is 2-1 but 0-1 on the road (blown out at KC). The offense ranks near bottom in yards (275/g) and points (20/g) despite a win over LAR last week that featured timely plays more than dominance.

Strengths
  • Bo Nix showing growth (60% comp, 4 TD vs 3 INT)
  • J.K. Dobbins providing steady ground game (121 yds on 35 carries)
  • Jaylen Waddle emerging as reliable target (11 rec, 150 yds)
  • Defense forced key stops vs LAR late (held to 26 pts)
Concerns
  • Offensive line depth crumbling: Gargiulo (G) out, Crum (OT) on IR
  • Marvin Mims Jr. out (foot) removes vertical threat
  • Jonathon Cooper out (personal) weakens pass rush rotation
  • Road offense struggled at KC (10 pts, 31-10 loss)
  • Nix still turnover-prone (3 INT in 3 games)
Injuries
  • Marvin Mims Jr. - Out - speed WR, stretches field for Nix
  • Jonah Coleman - IR - RB depth
  • Jonathon Cooper - Out - edge rusher, 2 sacks in '25
  • Nick Gargiulo - Out (ACL) - starting LG, OL continuity broken
  • Frank Crum - IR - swing tackle, depth already thin
Last game

Beat LAR 30-26: Only 257 total yards (179 pass/78 rush), won on 4th-quarter TD drive and late INT. 7-of-13 on 3rd down, 25:31 TOP. Nix efficient but not explosive. Defense bent but forced turnover when needed.

San Francisco 49ers

San Francisco is 3-0 at Levi's Stadium with an offense averaging 35.7 points and 418 yards over three games. The system is humming despite a mounting injury list on defense.

Strengths
  • Elite QB play from Purdy (789 yds, 9 TD, 1 INT in 2 games)
  • Christian McCaffrey returning to form (166 yds, 3 TD rushing)
  • George Kittle as a mismatch weapon (12 rec, 3 TD)
  • Offensive line keeping Purdy clean (0 sacks allowed last game)
Concerns
  • Nick Bosa out (calf) removes the defense's best pass rusher
  • Dre Greenlaw questionable (quad) weakens run defense and coverage
  • Mike Evans questionable (ribs) thins WR depth behind Kittle/Aiyuk
  • Defense allowing 324.5 yds/g and has 0 takeaways in 2 games
Injuries
  • Nick Bosa - Out - massive loss, defense lacks edge pressure without him
  • Dre Greenlaw - Questionable - key LB for run fits and TE coverage
  • Mike Evans - Questionable - veteran WR depth, but Kittle/Aiyuk primary targets
  • James Thompson Jr. - Out - rotational DT depth
  • Romello Height - Out - edge depth
Last game

Beat ARI 36-30: 437 total yards (297 pass/140 rush), 5-of-8 on 3rd down, 23 first downs, zero sacks allowed. Purdy efficient (297 yds), McCaffrey found rhythm (140 rush yds team), but defense gave up 30 points and generated no turnovers.

Key factors

  • SF offensive firepower (high, favors SF) — 49ers averaging 35.7 PPG at home with Purdy playing MVP-level ball; Broncos allow 380.7 YPG and 23.3 PPG
  • Nick Bosa absence (high, favors DEN) — Best defensive player out removes primary pass rush threat; could give Nix time to operate
  • Broncos OL injuries (high, favors SF) — Starting LG out (ACL), swing OT on IR; even without Bosa, SF interior pressure (Hargrave, Kinlaw) can disrupt Nix
  • Home field / rest parity (medium, favors SF) — SF 3-0 at Levi's, DEN 0-1 on road; both on 7 days rest neutralizes scheduling
  • Turnover differential (medium, favors SF) — Nix has 3 INT in 3 games; SF defense hasn't taken ball away yet (0 in 2 games) but regression to mean favors home team
  • Weather (low, favors neutral) — 82°F on grass favors neither team significantly
What it looked at
  • Season numbers (record, scoring, yards, turnover rates)
  • Venue and weather (Levi's Stadium, 82°F, grass)
  • Recent results and last game stats for both teams
  • Season stat leaders (QB, RB, WR production)
  • Injury report (impact players: Bosa, Greenlaw, Mims, Cooper, OL)
  • News and previews (none found)

Reasoning

San Francisco's offense is operating at an elite level - Purdy's 9:1 TD:INT ratio, McCaffrey rounding into form, and Kittle dominating matchups create problems Denver's 28th-ranked yardage defense cannot solve. The Broncos' win over LAR was gritty but unsustainable: 257 yards, 25 minutes possession, and a late touchdown drive masked offensive limitations. Nix remains turnover-prone (3 INTs) and now faces a pass rush that, even without Bosa, features interior disruptors against a patched Broncos line missing its starting left guard and swing tackle. Denver's 0-1 road mark (31-10 at KC) shows vulnerability away from altitude. While Bosa's absence is significant, the 49ers' offensive ceiling is simply too high for Denver's current floor. I expect SF to build a multi-score lead and hold on, similar to the ARI game but with better defensive execution late.

Sealed Tue, Sep 29, 6:38 AM EDT · SHA-256 952ee18c376b6516… (this pick cannot be changed)

Mistral Large

Mistral AI

Picks San Francisco 49ers · confidence 75% · predicted DEN 20 – SF 31Correct

San Francisco wins due to superior offensive firepower and a defense that can exploit Denver's weaknesses, particularly in the trenches and secondary, despite some key injuries.

Full analysis

Denver Broncos

Denver has shown resilience and clutch performances, particularly in their Week 3 win over the Rams, but their offense is still inconsistent and heavily reliant on Bo Nix's decision-making. Their defense has been gashed for big plays and struggles to stop the run, which plays into San Francisco's strengths.

Strengths
  • Bo Nix's mobility and ability to extend plays
  • Jaylen Waddle's big-play ability as a receiver
  • Defensive line can generate pressure with healthy pieces
Concerns
  • Inconsistent offensive line play, especially with injuries to Gargiulo and Crum
  • Defense allows too many yards (380.7 per game) and struggles in the secondary
  • Lack of a true rushing threat with Dobbins not fully established as a workhorse
Injuries
  • Marvin Mims Jr. - Out - Loss of a speedy receiver, reduces deep-threat options
  • Jonah Coleman - Injured Reserve - Limits RB depth, already a thin group
  • Nick Gargiulo - Out - Weakens interior offensive line, increases sack risk
  • Frank Crum - Injured Reserve - Further depletes OL depth
Last game

Narrow win over the Rams, where Denver's offense was efficient but not explosive (257 total yards). Bo Nix managed the game well, avoiding turnovers, but the defense allowed 26 points and nearly let a late lead slip. The run game was ineffective (78 yards), relying heavily on Nix's legs and short passes.

San Francisco 49ers

The 49ers are firing on all cylinders offensively, with Brock Purdy distributing the ball effectively and Christian McCaffrey providing a dynamic rushing threat. Their defense, though missing key pass rushers, remains stout against the run and can pressure the quarterback with their remaining talent.

Strengths
  • Elite offensive playmaking with Purdy, McCaffrey, and Kittle
  • Strong offensive line play, allowing minimal sacks
  • Balanced defense that can stop the run and create turnovers
Concerns
  • Key injuries to pass rushers (Bosa, Height) limit edge pressure
  • Secondary depth tested if Mike Evans is limited
  • Turnover luck (0 takeaways in 2 games) may not sustain
Injuries
  • Nick Bosa - Out - Major loss for pass rush, reduces pressure on opposing QBs
  • Romello Height - Out - Further weakens edge rush depth
  • Mike Evans - Questionable - If limited, reduces receiving options but not a core threat
  • Dre Greenlaw - Questionable - Impacts linebacker depth and run defense
Last game

Dominant offensive performance against Arizona, with 437 total yards and efficient third-down conversions (5-8). Defense bent but didn't break, allowing 30 points but forcing a late turnover to seal the win. Brock Purdy was sharp, and McCaffrey was a dual-threat weapon.

Key factors

  • Pass rush vs. offensive line (high, favors DEN) — Denver's defense can exploit SF's weakened pass rush (missing Bosa and Height), but SF's offensive line is elite and has allowed zero sacks in two games, which could neutralize Denver's pressure.
  • Run defense vs. McCaffrey (high, favors SF) — Denver's run defense has been poor (allowing 150+ yards per game), and McCaffrey is a dual-threat back who can exploit this weakness, especially in the passing game.
  • Secondary play (medium, favors SF) — Denver's secondary has struggled to contain big plays, and SF's receiving corps (Kittle, Aiyuk, etc.) can exploit mismatches, even if Mike Evans is limited.
  • Turnover margin (medium, favors neutral) — SF has been turnover-averse (0.5 per game) but has forced none. Denver has been turnover-prone (1.3 per game) and could self-destruct if Nix is pressured into mistakes.
  • Home field advantage (low, favors SF) — SF is 2-0 at home with dominant performances, while Denver is 0-1 on the road and has struggled in hostile environments.
  • Weather and surface (low, favors neutral) — 82°F and natural grass are ideal conditions for both teams, with no weather-related advantages.
What it looked at
  • Injury reports for both teams, focusing on key positions (QB, OL, DL, secondary)
  • Recent game stats and performance trends, particularly offensive and defensive efficiency
  • Season stat leaders to identify matchup advantages (e.g., McCaffrey vs. DEN run D)
  • Venue and weather conditions for situational context
  • Team records and recent results to gauge momentum and consistency
  • Past mistakes in my picks (e.g., overvaluing offensive firepower without considering defensive matchups, underestimating turnover impact)

Reasoning

San Francisco's offensive firepower, led by Brock Purdy and Christian McCaffrey, presents a significant challenge for Denver's defense, which has struggled against both the run and pass. While Denver's defense can generate pressure, the 49ers' offensive line has been nearly flawless, allowing zero sacks in two games. This matchup heavily favors SF, as their ability to control the line of scrimmage will limit Denver's defensive impact. On the other side, Denver's offense has been inconsistent, and their offensive line is banged up, which could spell trouble against a 49ers defense that, despite missing key pass rushers, remains stout against the run and can exploit Bo Nix's turnover tendencies. The 49ers' secondary is also better equipped to handle Denver's receiving threats, particularly if Jaylen Waddle is contained. While Denver has shown resilience in close games, their lack of a true rushing attack and defensive vulnerabilities make it difficult to see them containing San Francisco's balanced offense. The home-field advantage and SF's momentum further tilt the scales in their favor, though Denver's ability to avoid turnovers and capitalize on limited opportunities could keep it closer than expected.

Sealed Tue, Sep 29, 6:06 AM EDT · SHA-256 704ca63c6e0dade4… (this pick cannot be changed)

What the AIs looked at

Every AI received exactly this research pack. Betting lines and ESPN's own win predictor are deliberately left out.

Season numbers (the same brief players see)

  • DEN: 2-1 overall; 0-1 on the road; scoring 20 and allowing 23.3 a game; gaining 275 and allowing 380.7 yards a game over 3 games; 1.3 turnovers and 1.3 takeaways a game; 7 days since last game; 7 players on injured reserve or out; recent: W 30-26 vs LAR, W 20-13 vs JAX, L 10-31 at KC
  • SF: 2-0 overall; 2-0 on the home; scoring 35.5 and allowing 21.5 a game; gaining 409.5 and allowing 324.5 yards a game over 2 games; 0.5 turnovers and 0 takeaways a game; 7 days since last game; 18 players on injured reserve or out; recent: W 36-30 vs ARI, W 35-13 vs MIA
  • What each team has done so far, not a prediction. Any team can beat any team on a given day.

Venue and weather

  • Levi's Stadium (Santa Clara, CA); natural grass
  • Forecast: 82°F

Recent results and last game

  • SF: W 41-17 @ LAC 2026-08-21 (preseason); W 18-12 @ LV 2026-08-28 (preseason); W 27-7 vs LAR 2026-09-11; W 35-13 vs MIA 2026-09-20; W 36-30 vs ARI 2026-09-27
  • DEN: L 33-13 vs GB 2026-08-22 (preseason); W 34-6 vs MIN 2026-08-29 (preseason); L 31-10 @ KC 2026-09-15; W 20-13 vs JAX 2026-09-20; W 30-26 vs LAR 2026-09-28
  • DEN Most recent game (Week 3): W 30-26 vs LAR - total yards 257, passing yards 179, rushing yards 78, turnovers 1, 3rd down 7-13, possession 25:31, first downs 20, sacks-yards lost 1-7, penalties-yards 5-38
  • SF Most recent game (Week 3): W 36-30 vs ARI - total yards 437, passing yards 297, rushing yards 140, turnovers 1, 3rd down 5-8, possession 21:16, first downs 23, sacks-yards lost 0-0, penalties-yards 7-69

Season stat leaders

  • SF: Passing Yards: Brock Purdy (60/83, 789 YDS, 9 TD, 1 INT); Rushing Yards: Christian McCaffrey (35 CAR, 166 YDS, 3 TD); Receiving Yards: George Kittle (12 REC, 174 YDS, 3 TD)
  • DEN: Passing Yards: Bo Nix (56/93, 605 YDS, 4 TD, 3 INT); Rushing Yards: J.K. Dobbins (35 CAR, 121 YDS); Receiving Yards: Jaylen Waddle (11 REC, 150 YDS)

Injury report (ESPN)

  • SF: James Thompson Jr. DT - Out (Ankle); Nick Bosa DE - Out (Calf); Mike Evans WR - Questionable (Ribs); Romello Height DE - Out (Hand); Dre Greenlaw LB - Questionable (Quadriceps)
  • DEN: Marvin Mims Jr. WR - Out (Foot); Jonah Coleman RB - Injured Reserve (Ankle); Jonathon Cooper LB - Out (Personal); Nick Gargiulo G - Out (Knee - ACL); Frank Crum OT - Injured Reserve (Undisclosed)

News and previews

  • No recent news found

Built Tue, Sep 29, 6:01 AM EDT from ESPN and web news found by Javari AI.

Players' picks