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Claude Sonnet 4.6 vs GPT 6 Luna Pro

At a glance

Anthropic's previous-generation Sonnet, with strong performance across coding, agents, and professional work.

851M ctx$3.00/$15.00 per M#14/92

OpenAI's GPT-6 Luna served in pro reasoning mode for the hardest problems.

1.1M ctx$0.10/$0.50 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
Reasoning
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-10-02
Capability
CapabilityECI84.8
Reasoning & Knowledge
Graduate Science83.3%Factual Recall35.5%
Math
Competition Math82.2%
Coding
Real-World Coding75.2%
Agentic
Terminal Tasks53.4%Novel Reasoning60.4%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper97%
Capability
Capability—
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—
Coding
Real-World Coding—
Agentic
Terminal Tasks—Novel Reasoning—
Specs
1M
Context
128K
Max output
Feb 2026
Released
1.1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
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
Live pricing, shown before you run
Input97%$0.10/M tokens
Output97%$0.50/M tokens
Cache read97%$0.01/M tokens
Cache write97%$0.13/M tokens
Web search$0.01/search
Chat with Claude Sonnet 4.6Go to model
Chat with GPT 6 Luna ProGo to model
Frequently Asked Questions: Claude Sonnet 4.6 vs GPT 6 Luna Pro▼

Which is better, Claude Sonnet 4.6 or GPT 6 Luna Pro?

▼

Both Claude Sonnet 4.6 and GPT 6 Luna Pro 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 is cheaper, Claude Sonnet 4.6 or GPT 6 Luna Pro?

▼

GPT 6 Luna Pro has a lower blended cost. Claude Sonnet 4.6: $3.00 input / $15.00 output. GPT 6 Luna Pro: $0.10 input / $0.50 output.

Which has a larger context window, Claude Sonnet 4.6 or GPT 6 Luna Pro?

▼

GPT 6 Luna Pro has a larger context window: Claude Sonnet 4.6 supports 1M tokens vs GPT 6 Luna Pro at 1.1M tokens.

Do both Claude Sonnet 4.6 and GPT 6 Luna Pro support vision?

▼

Yes, both Claude Sonnet 4.6 and GPT 6 Luna Pro support vision/image input.

What are the key differences between Claude Sonnet 4.6 and GPT 6 Luna Pro?

▼

Key differences: GPT 6 Luna Pro 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 Claude Sonnet 4.6 and GPT 6 Luna Pro for free on idapt.app to see which performs better for your specific needs.

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