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Claude Sonnet 5 vs GPT 4o

At a glance

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

801M ctx$2.00/$10.00 per M#26/92

OpenAI's original omni model supporting text and image inputs.

63128K ctx$2.50/$10.00 per M#64/92
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
Reasoning
CI 72.7-84.7Provisional
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter27%Cheaper9%
Capability
CapabilityECI27%80.1
Reasoning & Knowledge
Graduate Science84%90.5%Expert-Level—Factual Recall25.0%
Math
Math Problems—Competition Math1383%94.7%Research Math—
Coding
Real-World Coding—Code Editing—
Agentic
Task Horizon—
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI63.0
Reasoning & Knowledge
Graduate Science49.2%Expert-Level2.7%Factual Recall—
Math
Math Problems53.3%Competition Math6.4%Research Math0.3%
Coding
Real-World Coding31.0%Code Editing23.1%
Agentic
Task Horizon9min
Specs
1M
Context
128K
Max output
Jun 2026
Released
128K
Context
16K
Max output
May 2024
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input20%$2.00/M tokens
Output$10.00/M tokens
Cache read84%$0.20/M tokens
Cache write$2.50/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$2.50/M tokens
Output$10.00/M tokens
Cache read$1.25/M tokens
Chat with Claude Sonnet 5Go to model
Chat with GPT 4oGo to model
Frequently Asked Questions: Claude Sonnet 5 vs GPT 4o▼

Which is better, Claude Sonnet 5 or GPT 4o?

▼

Based on the Capability Index, Claude Sonnet 5 scores higher (80.1 vs 63.0). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, Claude Sonnet 5 or GPT 4o?

▼

Claude Sonnet 5 has a lower blended cost. Claude Sonnet 5: $2.00 input / $10.00 output. GPT 4o: $2.50 input / $10.00 output.

Which has a larger context window, Claude Sonnet 5 or GPT 4o?

▼

Claude Sonnet 5 has a larger context window: Claude Sonnet 5 supports 1M tokens vs GPT 4o at 128K tokens.

Do both Claude Sonnet 5 and GPT 4o support vision?

▼

Yes, both Claude Sonnet 5 and GPT 4o support vision/image input.

What are the key differences between Claude Sonnet 5 and GPT 4o?

▼

Key differences: Claude Sonnet 5 has a notably higher capability index (17.1 point gap); only Claude Sonnet 5 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 Sonnet 5 and GPT 4o for free on idapt.app to see which performs better for your specific needs.

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