Pairwise benchmark snapshot · Aug 16, 2026

Claude Opus 5 vs Gemini 3.7 Flash benchmark

Name: Claude Opus 5 vs Gemini 3.7 Flash AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude Opus 5 (Anthropic) and Gemini 3.7 Flash (Google) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Opus 5 is ahead by 94 points (1,624 vs 1,530; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, Claude Opus 5 resolves 79.2% versus 72.4% (seed-bootstrap (Aug 16, 2026)). Gemini 3.7 Flash streams faster (215 tok/s) while Gemini 3.7 Flash is the cheaper output token ($1.88/1M). Gemini 3.7 Flash has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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Anthropic

Claude Opus 5

Anthropic current default flagship. Official API $5/$25 per 1M tokens and a 1M context window (Anthropic, Jul 24 2026).

Elo 1,624$50/1M out

Google

Gemini 3.7 Flash

Google Aug 13 2026 workhorse. Official intro price $0.75/$3.75 per 1M through Dec 31 2026; 1,048,576-token context (Google blog).

Elo 1,530$1.875/1M out

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Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 5 (5)vsGemini 3.7 Flash (5)

Claude Opus 5: 5W (50%)Overall: Even matchupGemini 3.7 Flash: 5W (50%)

← Claude Opus 5Gemini 3.7 Flash →

Claude Opus 5 (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,624vs1,530

Coding Elo

1,618vs1,546

SWE-bench

79.2%vs72.4%

LiveBench

74.8%vs69.6%

GPQA Diamond

87.1%vs81.2%

Claude Opus 5: 5WGemini 3.7 Flash: 0W

Gemini 3.7 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

72 tok/svs215 tok/s

Time to first token

310 msvs82 ms

Claude Opus 5: 0WGemini 3.7 Flash: 2W

Gemini 3.7 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$50/1Mvs$1.88/1M

Input price

$10/1Mvs$0.38/1M

Context window

1Mvs1M

Claude Opus 5: 0WGemini 3.7 Flash: 3W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageEven 3–3

Preference Elo

Claude Opus 5

94 pts advantage

Throughput Speed

Gemini 3.7 Flash

143 tok/s faster

Price Efficiency

Gemini 3.7 Flash

$48.13/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

+6%1,624

EloHigh is better

1,530

Code Elo

High is better

+5%1,618

Code EloHigh is better

1,546

LiveBench

High is better

+7%74.8%

LiveBenchHigh is better

69.6%

SWE-bench

High is better

+9%79.2%

SWE-benchHigh is better

72.4%

GPQA

High is better

+7%87.1%

GPQAHigh is better

81.2%

TTFT

Low is better

310 ms

TTFTLow is better

82 ms+278%

Speed

High is better

72 tok/s

SpeedHigh is better

215 tok/s+199%

In $

Low is better

$10/1M

In $Low is better

$0.38/1M+2567%

Out $

Low is better

$50/1M

Out $Low is better

$1.88/1M+2567%

Context

High is better

ContextHigh is better

1M+5%

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 96% with Gemini 3.7 Flash

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Claude Opus 5$1,100.00 / mo

In: $350.00Out: $750.00

Gemini 3.7 Flash$41.25 / mo

In: $13.13Out: $28.13

Estimated Cost Delta

Gemini 3.7 Flash is estimated to save $1,058.75/month ($12,705/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Opus 5:Pick Claude Opus 5 when repo-level coding accuracy is the constraint.
2
Gemini 3.7 Flash:Pick Gemini 3.7 Flash when you are optimizing output cost.
3
Gemini 3.7 Flash:Pick Gemini 3.7 Flash when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsClaude Opus 5

Higher SWE-bench (79.2%).

High-volume chatGemini 3.7 Flash

Lower output list price ($1.88/1M).

Voice / low-latency UIGemini 3.7 Flash

Lower TTFT (82 ms).

Long-document RAGGemini 3.7 Flash

Larger window (1M).

Screenshots / visionClaude Opus 5

Both accept images. Defaulting to the higher-Elo side (Claude Opus 5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 5	Higher SWE-bench (79.2%).
High-volume chat	Gemini 3.7 Flash	Lower output list price ($1.88/1M).
Voice / low-latency UI	Gemini 3.7 Flash	Lower TTFT (82 ms).
Long-document RAG	Gemini 3.7 Flash	Larger window (1M).
Screenshots / vision	Claude Opus 5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 5).

Related Editorial Dispatches & Benchmark Notes

View all news

compareAug 13, 2026

Gemini Flash vs Pro: when Flash is the whole product

3.7 Flash vs 3.6 Pro is the current Google volume-versus-upgrade pair.

priceAug 13, 2026

Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Jul 21 workhorse that inherited $0.75/$3.75 through year-end. Keep the row; 3.7 is the newer sibling.

launchAug 13, 2026

Gemini 3.7 Flash (Aug 13): $0.75/$3.75 intro through Dec 31 2026

Google’s current workhorse drop. Official intro list and 1,048,576-token context. Compare to Luna and Haiku.

compareAug 10, 2026

Sonnet vs Opus in 2026: same family, different invoice

Usually Sonnet 5 vs Opus 5. Coding delta versus output $/1M. The workhorse question.

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LIVE

Anthropic

Claude Opus 5

Elo 1,624

LiveBench74.8%

SWE-bench79.2%

Speed72 tok/s

Output cost$50/1M

Google

Gemini 3.7 Flash

Elo 1,530

LiveBench69.6%

SWE-bench72.4%

Speed215 tok/s

Output cost$1.88/1M

Frequently Asked Questions

Which is better overall, Claude Opus 5 or Gemini 3.7 Flash?: Claude Opus 5 has the higher preference Elo in our latest snapshot (1,624). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Opus 5 or Gemini 3.7 Flash?: Claude Opus 5 leads SWE-bench at 79.2% vs 72.4%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: Gemini 3.7 Flash output tokens are $1.88/1M versus $50/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Opus 5 or Gemini 3.7 Flash?: Gemini 3.7 Flash has the lower time-to-first-token (82 ms vs 310 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Gemini 3.7 Flash accepts 1M tokens versus 1M.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 5 and Gemini 3.7 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude Opus 5 matchups →|All Gemini 3.7 Flash matchups →

Claude Opus 5 vs Claude Opus 4.8 (previous opus)Gemini 3.7 Flash vs Gemini 3.6 Flash (previous gemini-flash)Claude Fable 5 vs Claude Opus 5 Claude Opus 4.6 vs Gemini 3.7 Flash Gemini 3.6 Pro vs Gemini 3.7 Flash Claude Opus 4.5 vs Gemini 3.7 Flash

Claude Opus 5 vs Gemini 3.7 Flash benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 5 (5)vsGemini 3.7 Flash (5)

Claude Opus 5: 5W (50%)Overall: Even matchupGemini 3.7 Flash: 5W (50%)

← Claude Opus 5Gemini 3.7 Flash →

Claude Opus 5 (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,624vs1,530

Coding Elo

1,618vs1,546

SWE-bench

79.2%vs72.4%

LiveBench

74.8%vs69.6%

GPQA Diamond

87.1%vs81.2%

Claude Opus 5: 5WGemini 3.7 Flash: 0W

Gemini 3.7 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

72 tok/svs215 tok/s

Time to first token

310 msvs82 ms

Claude Opus 5: 0WGemini 3.7 Flash: 2W

Gemini 3.7 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$50/1Mvs$1.88/1M

Input price

$10/1Mvs$0.38/1M

Context window

1Mvs1M

Claude Opus 5: 0WGemini 3.7 Flash: 3W

Recommended Workload Routing

Repo / coding agentsClaude Opus 5

Higher SWE-bench (79.2%).

High-volume chatGemini 3.7 Flash

Lower output list price ($1.88/1M).

Voice / low-latency UIGemini 3.7 Flash

Lower TTFT (82 ms).

Long-document RAGGemini 3.7 Flash

Larger window (1M).

Screenshots / visionClaude Opus 5

Both accept images. Defaulting to the higher-Elo side (Claude Opus 5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 5	Higher SWE-bench (79.2%).
High-volume chat	Gemini 3.7 Flash	Lower output list price ($1.88/1M).
Voice / low-latency UI	Gemini 3.7 Flash	Lower TTFT (82 ms).
Long-document RAG	Gemini 3.7 Flash	Larger window (1M).
Screenshots / vision	Claude Opus 5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 5).

Frequently Asked Questions

Which is better overall, Claude Opus 5 or Gemini 3.7 Flash?

Claude Opus 5 has the higher preference Elo in our latest snapshot (1,624). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude Opus 5 or Gemini 3.7 Flash?

Claude Opus 5 leads SWE-bench at 79.2% vs 72.4%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

Gemini 3.7 Flash output tokens are $1.88/1M versus $50/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Opus 5 or Gemini 3.7 Flash?

Gemini 3.7 Flash has the lower time-to-first-token (82 ms vs 310 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Gemini 3.7 Flash accepts 1M tokens versus 1M.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 5 and Gemini 3.7 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Claude Opus 5

Gemini 3.7 Flash

Gemini 3.7 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Gemini Flash vs Pro: when Flash is the whole product

Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Gemini 3.7 Flash (Aug 13): $0.75/$3.75 intro through Dec 31 2026

Sonnet vs Opus in 2026: same family, different invoice

Cast Your Matchup Vote

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CompareLLM Matrix

Claude Opus 5

Gemini 3.7 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Claude Opus 5

Gemini 3.7 Flash

Gemini 3.7 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Gemini Flash vs Pro: when Flash is the whole product

Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Gemini 3.7 Flash (Aug 13): $0.75/$3.75 intro through Dec 31 2026

Sonnet vs Opus in 2026: same family, different invoice

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude Opus 5

Gemini 3.7 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons