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Mistral Small 3.1 vs GPT 6 Luna Pro

At a glance

Previous Mistral Small with vision support and 128K context.

128K ctx$0.35/$0.55 per M

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
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper50%
Specs
128K
Context
102K
Max output
Mar 2025
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$0.35/M tokens
Output$0.55/M tokens
Live pricing, shown before you run
Input72%$0.10/M tokens
Output10%$0.50/M tokens
Cache read$0.01/M tokens
Cache write$0.13/M tokens
Web search$0.01/search
Chat with Mistral Small 3.1Go to model
Chat with GPT 6 Luna ProGo to model
Frequently Asked Questions: Mistral Small 3.1 vs GPT 6 Luna Pro▼

Which is better, Mistral Small 3.1 or GPT 6 Luna Pro?

▼

Both Mistral Small 3.1 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, Mistral Small 3.1 or GPT 6 Luna Pro?

▼

GPT 6 Luna Pro has a lower blended cost. Mistral Small 3.1: $0.35 input / $0.55 output. GPT 6 Luna Pro: $0.10 input / $0.50 output.

Which has a larger context window, Mistral Small 3.1 or GPT 6 Luna Pro?

▼

GPT 6 Luna Pro has a larger context window: Mistral Small 3.1 supports 128K tokens vs GPT 6 Luna Pro at 1.1M tokens.

Do both Mistral Small 3.1 and GPT 6 Luna Pro support vision?

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Yes, both Mistral Small 3.1 and GPT 6 Luna Pro support vision/image input.

What are the key differences between Mistral Small 3.1 and GPT 6 Luna Pro?

▼

Key differences: GPT 6 Luna Pro is significantly cheaper; only GPT 6 Luna Pro 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 Mistral Small 3.1 and GPT 6 Luna Pro for free on idapt.app to see which performs better for your specific needs.

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