Claude Sonnet 4 vs Gemini 3.7 Flash
Comparing Claude Sonnet 4 and Gemini 3.7 Flash across benchmarks, pricing, and capabilities.
Anthropic · Google · Updated for 2026
Which is better?
Claude Sonnet 4 and Gemini 3.7 Flash trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Gemini 3.7 Flash is roughly 4.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 3.7 Flash also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Claude Sonnet 4
- you want predictable pricing at $3.00/M input and $15.00/M output
Choose Gemini 3.7 Flash
- cost matters — it's about 4.0x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Claude Sonnet 4 and Gemini 3.7 Flashdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Sonnet 4 ($3.00/1M tokens) is 4.0x more expensive than Gemini 3.7 Flash ($0.75/1M tokens).
For output processing, Claude Sonnet 4 ($15.00/1M tokens) is 4.0x more expensive than Gemini 3.7 Flash ($3.75/1M tokens).
In conclusion, Claude Sonnet 4 is more expensive than Gemini 3.7 Flash.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 3.7 Flash accepts 1,048,576 input tokens compared to Claude Sonnet 4's 200,000 tokens. Gemini 3.7 Flash can generate longer responses up to 65,536 tokens, while Claude Sonnet 4 is limited to 64,000 tokens.
Input Capabilities
Supported data types and modalities
Both Claude Sonnet 4 and Gemini 3.7 Flash support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Sonnet 4
Gemini 3.7 Flash
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Sonnet 4 was released on 2025-05-22, while Gemini 3.7 Flash was released on 2026-08-13.
Gemini 3.7 Flash is 15 months newer than Claude Sonnet 4.
May 22, 2025
1.3 years ago
Aug 13, 2026
1 weeks ago
1.2yr newerKnowledge Cutoff
When training data ends
Gemini 3.7 Flash has a documented knowledge cutoff of 2026-03-31, while Claude Sonnet 4'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 4's cutoff date.
—
Mar 2026
Provider Availability
Claude Sonnet 4 is available from Anthropic, Bedrock, Google. Gemini 3.7 Flash is available from Google.
Claude Sonnet 4
Gemini 3.7 Flash
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Sonnet 4 and Gemini 3.7 Flash side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Sonnet 4 vs Gemini 3.7 Flash.