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GPT 5.1 Codex Mini vs Claude Opus 5

At a glance

Compact coding model for fast, cost-efficient development tasks.

400K ctx$0.25/$2.00 per M

Anthropic's flagship for demanding reasoning, coding, and long-horizon agentic work.

1M ctx$5.00/$25.00 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
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Cheaper93%
Agentic
Terminal Tasks61.6%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Agentic
Terminal Tasks—
Specs
400K
Context
100K
Max output
Nov 2025
Released
1M
Context
128K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input95%$0.25/M tokens
Output92%$2.00/M tokens
Cache read95%$0.02/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$5.00/M tokens
Output$25.00/M tokens
Cache read$0.50/M tokens
Cache write$6.25/M tokens
Web search$0.01/search
Chat with GPT 5.1 Codex MiniGo to model
Chat with Claude Opus 5Go to model
Frequently Asked Questions: GPT 5.1 Codex Mini vs Claude Opus 5▼

Which is better, GPT 5.1 Codex Mini or Claude Opus 5?

▼

Both GPT 5.1 Codex Mini and Claude Opus 5 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 5.1 Codex Mini or Claude Opus 5?

▼

GPT 5.1 Codex Mini has a lower blended cost. GPT 5.1 Codex Mini: $0.25 input / $2.00 output. Claude Opus 5: $5.00 input / $25.00 output.

Which has a larger context window, GPT 5.1 Codex Mini or Claude Opus 5?

▼

Claude Opus 5 has a larger context window: GPT 5.1 Codex Mini supports 400K tokens vs Claude Opus 5 at 1M tokens.

Do both GPT 5.1 Codex Mini and Claude Opus 5 support vision?

▼

Yes, both GPT 5.1 Codex Mini and Claude Opus 5 support vision/image input.

What are the key differences between GPT 5.1 Codex Mini and Claude Opus 5?

▼

Key differences: GPT 5.1 Codex Mini 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 GPT 5.1 Codex Mini and Claude Opus 5 for free on idapt.app to see which performs better for your specific needs.

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