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GPT 5.6 Luna vs Codestral (2508)

At a glance

OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.

1.1M ctx$1.00/$6.00 per M

Mistral's dedicated code model — August 2025 update.

256K ctx$0.30/$0.90 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
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Reasoning & Knowledge
Graduate Science92.3%
Agentic
Terminal Tasks84.7%
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper80%
Reasoning & Knowledge
Graduate Science—
Agentic
Terminal Tasks—
Specs
1.1M
Context
128K
Max output
Jul 2026
Released
256K
Context
16K
Max output
Aug 2025
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$1.00/M tokens
Output$6.00/M tokens
Cache read$0.10/M tokens
Cache write$1.25/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input70%$0.30/M tokens
Output85%$0.90/M tokens
Cache read70%$0.03/M tokens
Chat with GPT 5.6 LunaGo to model
Chat with Codestral (2508)Go to model
Frequently Asked Questions: GPT 5.6 Luna vs Codestral (2508)▼

Which is better, GPT 5.6 Luna or Codestral (2508)?

▼

Both GPT 5.6 Luna and Codestral (2508) 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, GPT 5.6 Luna or Codestral (2508)?

▼

Codestral (2508) has a lower blended cost. GPT 5.6 Luna: $1.00 input / $6.00 output. Codestral (2508): $0.30 input / $0.90 output.

Which has a larger context window, GPT 5.6 Luna or Codestral (2508)?

▼

GPT 5.6 Luna has a larger context window: GPT 5.6 Luna supports 1.1M tokens vs Codestral (2508) at 256K tokens.

Do both GPT 5.6 Luna and Codestral (2508) support vision?

▼

GPT 5.6 Luna supports vision/image input, but Codestral (2508) does not.

What are the key differences between GPT 5.6 Luna and Codestral (2508)?

▼

Key differences: Codestral (2508) is significantly cheaper; only GPT 5.6 Luna supports vision input; only GPT 5.6 Luna 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 GPT 5.6 Luna and Codestral (2508) for free on idapt.app to see which performs better for your specific needs.

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