Claude Opus 4.6 vs GPT-5 Codex Comparison
Comparing Claude Opus 4.6 and GPT-5 Codex across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
Claude Opus 4.6 outperforms in 1 benchmarks (SWE-Bench Verified), while GPT-5 Codex is better at 0 benchmarks.
Claude Opus 4.6 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
Cost data unavailable.
Context Window
Maximum input and output token capacity
Only Claude Opus 4.6 specifies input context (200,000 tokens). Only Claude Opus 4.6 specifies output context (128,000 tokens).
Input Capabilities
Supported data types and modalities
Claude Opus 4.6 supports multimodal inputs, whereas GPT-5 Codex does not.
Claude Opus 4.6 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Opus 4.6
GPT-5 Codex
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Opus 4.6 was released on 2026-02-05, while GPT-5 Codex was released on 2025-09-15.
Claude Opus 4.6 is 5 months newer than GPT-5 Codex.
Feb 5, 2026
1 months ago
4mo newerSep 15, 2025
6 months ago
Knowledge Cutoff
When training data ends
GPT-5 Codex has a documented knowledge cutoff of 2024-09-30, while Claude Opus 4.6's cutoff date is not specified.
We can confirm GPT-5 Codex's training data extends to 2024-09-30, but cannot make a direct comparison without Claude Opus 4.6's cutoff date.
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Sep 2024
Outputs Comparison
Key Takeaways
Claude Opus 4.6
View detailsAnthropic
GPT-5 Codex
View detailsOpenAI
Detailed Comparison
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