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Claude 3.5 Sonnet vs Gemini 3.8 Flash

At a glance

Claude 3.5 Sonnet — better-than-Opus capabilities at Sonnet speeds.

68200K ctx#59/92

Google's most intelligent Flash model, with significant gains over 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.

1.0M ctx$0.75/$3.75 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI· as of 2026-07-10
Capability
CapabilityECI67.5
Reasoning & Knowledge
Graduate Science55.3%Expert-Level4.1%
Math
Math Problems56.9%Competition Math8.5%Research Math2.1%
Coding
Code Editing51.6%
Agentic
Task Horizon30min
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Capability
Capability—
Reasoning & Knowledge
Graduate Science—Expert-Level—
Math
Math Problems—Competition Math—Research Math—
Coding
Code Editing—
Agentic
Task Horizon—
Specs
200K
Context
8K
Max output
—
Released
1.0M
Context
66K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$0.75/M tokens
Output$3.75/M tokens
Reasoning$3.75/M tokens
Cache read$0.07/M tokens
Cache write$0.04/M tokens
Image input$0.75/M tokens
Audio input$0.75/M tokens
Web search$0.01/search
Chat with Claude 3.5 SonnetGo to model
Chat with Gemini 3.8 FlashGo to model
Frequently Asked Questions: Claude 3.5 Sonnet vs Gemini 3.8 Flash▼

Which is better, Claude 3.5 Sonnet or Gemini 3.8 Flash?

▼

Both Claude 3.5 Sonnet and Gemini 3.8 Flash are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which has a larger context window, Claude 3.5 Sonnet or Gemini 3.8 Flash?

▼

Gemini 3.8 Flash has a larger context window: Claude 3.5 Sonnet supports 200K tokens vs Gemini 3.8 Flash at 1M tokens.

Do both Claude 3.5 Sonnet and Gemini 3.8 Flash support vision?

▼

Yes, both Claude 3.5 Sonnet and Gemini 3.8 Flash support vision/image input.

What are the key differences between Claude 3.5 Sonnet and Gemini 3.8 Flash?

▼

Key differences: only Gemini 3.8 Flash offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude 3.5 Sonnet and Gemini 3.8 Flash for free on idapt.app to see which performs better for your specific needs.

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