Pairwise benchmark snapshot · Aug 16, 2026

Claude Opus 4.5 vs Gemini 3.7 Flash benchmark

Name: Claude Opus 4.5 vs Gemini 3.7 Flash AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude Opus 4.5 (Anthropic) and Gemini 3.7 Flash (Google) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Opus 4.5 is ahead by 38 points (1,568 vs 1,530; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, Claude Opus 4.5 resolves 76.8% versus 72.4% (seed-bootstrap (Aug 1, 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 4.5

Anthropic frontier coding and computer-use model. SWE-bench leader on the official mini-SWE-agent harness in the Feb 2026 refresh.

Elo 1,568$25/1M 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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Quick vs:vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet vs GPT-5

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 4.5 (5)vsGemini 3.7 Flash (5)

Claude Opus 4.5: 5W (50%)Overall: Even matchupGemini 3.7 Flash: 5W (50%)

← Claude Opus 4.5Gemini 3.7 Flash →

Claude Opus 4.5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,568vs1,530

Coding Elo

1,574vs1,546

SWE-bench

76.8%vs72.4%

LiveBench

71.2%vs69.6%

GPQA Diamond

84.1%vs81.2%

Claude Opus 4.5: 5WGemini 3.7 Flash: 0W

Gemini 3.7 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

62 tok/svs215 tok/s

Time to first token

380 msvs82 ms

Claude Opus 4.5: 0WGemini 3.7 Flash: 2W

Gemini 3.7 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$25/1Mvs$1.88/1M

Input price

$5/1Mvs$0.38/1M

Context window

200kvs1M

Claude Opus 4.5: 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 4.5

38 pts advantage

Throughput Speed

Gemini 3.7 Flash

153 tok/s faster

Price Efficiency

Gemini 3.7 Flash

$23.13/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

+2%1,568

EloHigh is better

1,530

Code Elo

High is better

+2%1,574

Code EloHigh is better

1,546

LiveBench

High is better

+2%71.2%

LiveBenchHigh is better

69.6%

SWE-bench

High is better

+6%76.8%

SWE-benchHigh is better

72.4%

GPQA

High is better

+4%84.1%

GPQAHigh is better

81.2%

TTFT

Low is better

380 ms

TTFTLow is better

82 ms+363%

Speed

High is better

62 tok/s

SpeedHigh is better

215 tok/s+247%

In $

Low is better

$5/1M

In $Low is better

$0.38/1M+1233%

Out $

Low is better

$25/1M

Out $Low is better

$1.88/1M+1233%

Context

High is better

200k

ContextHigh is better

1M+424%

Interactive Simulator

Workload Cost & Savings Calculator

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

Save up to 93% 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 4.5$550.00 / mo

In: $175.00Out: $375.00

Gemini 3.7 Flash$41.25 / mo

In: $13.13Out: $28.13

Estimated Cost Delta

Gemini 3.7 Flash is estimated to save $508.75/month ($6,105/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Opus 4.5:Pick Claude Opus 4.5 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 4.5

Higher SWE-bench (76.8%).

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 4.5

Both accept images. Defaulting to the higher-Elo side (Claude Opus 4.5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4.5	Higher SWE-bench (76.8%).
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 4.5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 4.5).

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.

launchJul 15, 2026

Gemini 3.6 Pro: Google’s current Pro-class long-context row

2M context, Pro-class Elo and coding. Upgrade path from Flash is this page, not a vibe check.

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LIVE

Anthropic

Claude Opus 4.5

Elo 1,568

LiveBench71.2%

SWE-bench76.8%

Speed62 tok/s

Output cost$25/1M

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 4.5 or Gemini 3.7 Flash?: Claude Opus 4.5 has the higher preference Elo in our latest snapshot (1,568). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Opus 4.5 or Gemini 3.7 Flash?: Claude Opus 4.5 leads SWE-bench at 76.8% 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 $25/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Opus 4.5 or Gemini 3.7 Flash?: Gemini 3.7 Flash has the lower time-to-first-token (82 ms vs 380 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 200k.
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 4.5 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 4.5 matchups →|All Gemini 3.7 Flash matchups →

Claude Opus 4.5 vs Claude Opus 4 (previous opus)Claude Opus 4.5 vs Claude Opus 4.6 (next opus)Gemini 3.7 Flash vs Gemini 3.6 Flash (previous gemini-flash)Gemini 3.6 Pro vs Claude Opus 4.5 Claude Sonnet 5 vs Claude Opus 4.5 Gemini 3 Pro vs Claude Opus 4.5

Claude Opus 4.5 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 4.5 (5)vsGemini 3.7 Flash (5)

Claude Opus 4.5: 5W (50%)Overall: Even matchupGemini 3.7 Flash: 5W (50%)

← Claude Opus 4.5Gemini 3.7 Flash →

Claude Opus 4.5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,568vs1,530

Coding Elo

1,574vs1,546

SWE-bench

76.8%vs72.4%

LiveBench

71.2%vs69.6%

GPQA Diamond

84.1%vs81.2%

Claude Opus 4.5: 5WGemini 3.7 Flash: 0W

Gemini 3.7 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

62 tok/svs215 tok/s

Time to first token

380 msvs82 ms

Claude Opus 4.5: 0WGemini 3.7 Flash: 2W

Gemini 3.7 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$25/1Mvs$1.88/1M

Input price

$5/1Mvs$0.38/1M

Context window

200kvs1M

Claude Opus 4.5: 0WGemini 3.7 Flash: 3W

Recommended Workload Routing

Repo / coding agentsClaude Opus 4.5

Higher SWE-bench (76.8%).

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 4.5

Both accept images. Defaulting to the higher-Elo side (Claude Opus 4.5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4.5	Higher SWE-bench (76.8%).
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 4.5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 4.5).

Frequently Asked Questions

Which is better overall, Claude Opus 4.5 or Gemini 3.7 Flash?

Claude Opus 4.5 has the higher preference Elo in our latest snapshot (1,568). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude Opus 4.5 or Gemini 3.7 Flash?

Claude Opus 4.5 leads SWE-bench at 76.8% 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 $25/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Opus 4.5 or Gemini 3.7 Flash?

Gemini 3.7 Flash has the lower time-to-first-token (82 ms vs 380 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 200k.

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 4.5 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 4.5

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

Gemini 3.6 Pro: Google’s current Pro-class long-context row

Cast Your Matchup Vote

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CompareLLM Matrix

Claude Opus 4.5

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 4.5

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

Gemini 3.6 Pro: Google’s current Pro-class long-context row

Cast Your Matchup Vote

Community Discussions (0)

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CompareLLM Matrix

Claude Opus 4.5

Gemini 3.7 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons