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Claude Sonnet 5 vs Gemini 3.7 Flash

Claude Sonnet 5 and Gemini 3.7 Flash are closely matched at 48.3 and 48.7 on the LLM Stats Score. Gemini 3.7 Flash is 2.7x cheaper per token.

Anthropic · Google · Updated for 2026

Which is better?

Claude Sonnet 5 and Gemini 3.7 Flash are closely matched on the overall LLM Stats Score at 48.3 and 48.7.

In the 5 individual benchmarks reported for both models, Gemini 3.7 Flash wins 4; this is a narrower head-to-head signal than the composite indexes.

On price, Gemini 3.7 Flash is roughly 2.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Sonnet 5

  • you want predictable pricing at $2.00/M input and $10.00/M output

Choose Gemini 3.7 Flash

  • you value its reported benchmark strengths — it wins 4 of 5 exact shared results
  • cost matters — it's about 2.7x cheaper per token
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Claude Sonnet 5
Anthropic
Gemini 3.7 Flash
Google
Core performance indexes
LLM Stats Score
48.3
#23
48.7
#22
Reasoning
47.7
#22
46.5
#26
Coding
36.9
#19
35.4
#28
Agents
31.6
#28
33.3
#24
Cost, coverage & limits
Benchmark wins
1 of 5
4 of 5
Input price
$2.00 / M
$0.75 / M
Output price
$10.00 / M
$3.75 / M
Context window
1,000,000
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Sonnet 5
Gemini 3.7 Flash
Vision
33.9#16
32.8#20
Tool use
24.0#39
26.4#29
Multimodal
32.8#20
34.1#14
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

23 reported for Claude Sonnet 5 · 18 for Gemini 3.7 Flash

5 shared

Claude Sonnet 5 outperforms in 1 benchmarks (GDP.pdf), while Gemini 3.7 Flash is better at 4 benchmarks (AutomationBench, CharXiv-R, DeepSWE 1.1, FrontierCode 1.1).

Gemini 3.7 Flash significantly outperforms across most benchmarks.

Thu Sep 17 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 3.7 Flash costs less

For input processing, Claude Sonnet 5 ($2.00/1M tokens) is 2.7x more expensive than Gemini 3.7 Flash ($0.75/1M tokens).

For output processing, Claude Sonnet 5 ($10.00/1M tokens) is 2.7x more expensive than Gemini 3.7 Flash ($3.75/1M tokens).

In conclusion, Claude Sonnet 5 is more expensive than Gemini 3.7 Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Sep 17 2026 • llm-stats.com
Anthropic
Claude Sonnet 5
Input tokens$2.00
Output tokens$10.00
Best providerAnthropic
Google
Gemini 3.7 Flash
Input tokens$0.75
Output tokens$3.75
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. Gemini 3.7 Flash can generate longer responses up to 1,000,000 tokens, while Claude Sonnet 5 is limited to 64,000 tokens.

Anthropic
Claude Sonnet 5
Input1,000,000 tokens
Output64,000 tokens
Google
Gemini 3.7 Flash
Input1,000,000 tokens
Output1,000,000 tokens
Thu Sep 17 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Sonnet 5 and Gemini 3.7 Flash support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Sonnet 5

Text
Images
Audio
Video

Gemini 3.7 Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Sonnet 5

Proprietary

Closed source

Gemini 3.7 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 5 was released on 2026-06-30, while Gemini 3.7 Flash was released on 2026-08-13.

Gemini 3.7 Flash is 1 month newer than Claude Sonnet 5.

Claude Sonnet 5

Jun 30, 2026

2 months ago

Gemini 3.7 Flash

Aug 13, 2026

1 months ago

1mo newer

Knowledge Cutoff

When training data ends

Gemini 3.7 Flash has a documented knowledge cutoff of 2026-03-31, while Claude Sonnet 5's cutoff date is not specified.

We can confirm Gemini 3.7 Flash's training data extends to 2026-03-31, but cannot make a direct comparison without Claude Sonnet 5's cutoff date.

Claude Sonnet 5

—

Gemini 3.7 Flash

Mar 2026

Provider Availability

Claude Sonnet 5 is available from Anthropic, DeepInfra. Gemini 3.7 Flash is available from DeepInfra, Google.

Claude Sonnet 5

anthropic logo
Anthropic
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
deepinfra logo
Deepinfra
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Gemini 3.7 Flash

deepinfra logo
Deepinfra
Input Price:Input: $0.75/1MOutput Price:Output: $3.75/1M
google logo
Google
Input Price:Input: $0.75/1MOutput Price:Output: $3.75/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Sonnet 5 and Gemini 3.7 Flash side-by-side, then vote on the output you prefer.

Claude Sonnet 5
✓ Preferred
Gemini 3.7 Flash
Open in Playground

FAQ

Common questions about Claude Sonnet 5 vs Gemini 3.7 Flash.

Which is better, Claude Sonnet 5 or Gemini 3.7 Flash?

Claude Sonnet 5 and Gemini 3.7 Flash are closely matched on the LLM Stats Score at 48.3 and 48.7. Claude Sonnet 5 is made by Anthropic and Gemini 3.7 Flash is made by Google. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Sonnet 5 compare to Gemini 3.7 Flash in benchmarks?

Claude Sonnet 5 scores CharXiv-R: 88.3%, ChartMuseum: 86.7%, SWE-Bench Verified: 85.2%, BrowseComp: 84.7%, GDP.pdf: 81.6%. Gemini 3.7 Flash scores MRCR v2 (8-needle): 97.0%, Harvey LAB-AA: 90.7%, CharXiv-R: 88.7%, Terminal-Bench 2.1: 85.8%, LVBench: 85.4%.

Is Claude Sonnet 5 cheaper than Gemini 3.7 Flash?

Gemini 3.7 Flash is 2.7x cheaper for input tokens. Claude Sonnet 5 costs $2.00/M input and $10.00/M output via anthropic. Gemini 3.7 Flash costs $0.75/M input and $3.75/M output via deepinfra.

What are the context window sizes for Claude Sonnet 5 and Gemini 3.7 Flash?

Claude Sonnet 5 supports 1.0M tokens and Gemini 3.7 Flash supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Sonnet 5 and Gemini 3.7 Flash?

Key differences include LLM Stats Score (48.3 vs 48.7), input pricing ($2.00 vs $0.75/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5 and Gemini 3.7 Flash?

Claude Sonnet 5 is developed by Anthropic and Gemini 3.7 Flash is developed by Google.

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