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Gemini 2.5 Flash vs Claude Sonnet 5

At a glance
GoogleGemini 2.5 Flash

Fast workhorse model with built-in thinking and audio support.

731.0M ctx$0.30/$2.50 per M#50/92
AnthropicClaude Sonnet 5

Anthropic's fifth-generation Sonnet — near-Opus intelligence at Sonnet speed and price.

801M ctx$3.00/$15.00 per M#26/92
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
GoogleGemini 2.5 Flash
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI72.9
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—Research Math4.8%
Agentic
Terminal Tasks17.1%
AnthropicClaude Sonnet 5
Reasoning
CI 72.7-84.7
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter
Capability
CapabilityECI80.1
Reasoning & Knowledge
Graduate Science90.5%Factual Recall25.0%
Math
Competition Math94.7%Research Math—
Agentic
Terminal Tasks—
Specs
GoogleGemini 2.5 Flash
1.0M
Context
66K
Max output
Jun 2025
Released
AnthropicClaude Sonnet 5
1M
Context
64K
Max output
Jun 2026
Released
Capabilities
GoogleGemini 2.5 Flash
Vision
Audio
Reasoning
AnthropicClaude Sonnet 5
Vision
Audio
Reasoning
Pricing
GoogleGemini 2.5 Flash
Live pricing, shown before you run
Input$0.30/M tokens
Output$2.50/M tokens
Reasoning$2.50/M tokens
Cache read$0.03/M tokens
Cache write$0.08/M tokens
Image input$0.30/M tokens
Audio input$1.00/M tokens
Web search$0.01/search
AnthropicClaude Sonnet 5
Live pricing, shown before you run
Input$3.00/M tokens
Output$15.00/M tokens
Cache read$0.30/M tokens
Cache write$3.75/M tokens
Web search$0.01/search
Chat with Gemini 2.5 FlashGo to model
Chat with Claude Sonnet 5Go to model
Frequently Asked Questions: Gemini 2.5 Flash vs Claude Sonnet 5▼

Which is better, Gemini 2.5 Flash or Claude Sonnet 5?

▼

Based on the Capability Index, Claude Sonnet 5 scores higher (80.1 vs 72.9). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, Gemini 2.5 Flash or Claude Sonnet 5?

▼

Gemini 2.5 Flash has a lower blended cost. Gemini 2.5 Flash: $0.30 input / $2.50 output. Claude Sonnet 5: $3.00 input / $15.00 output.

Which has a larger context window, Gemini 2.5 Flash or Claude Sonnet 5?

▼

Gemini 2.5 Flash has a larger context window: Gemini 2.5 Flash supports 1M tokens vs Claude Sonnet 5 at 1M tokens.

Do both Gemini 2.5 Flash and Claude Sonnet 5 support vision?

▼

Yes, both Gemini 2.5 Flash and Claude Sonnet 5 support vision/image input.

What are the key differences between Gemini 2.5 Flash and Claude Sonnet 5?

▼

Key differences: Claude Sonnet 5 has a notably higher capability index (7.2 point gap); Gemini 2.5 Flash is significantly cheaper. 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 Gemini 2.5 Flash and Claude Sonnet 5 for free on idapt.app to see which performs better for your specific needs.

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