Anthropic: Claude Opus 4.1 vs OpenAI: GPT-5 Codex
Side-by-side comparison of Anthropic: Claude Opus 4.1 and OpenAI: GPT-5 Codex. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
strong confidenceOpenAI: GPT-5 Codex leads overall
OpenAI: GPT-5 Codex leads in price and context window and max output, making it the stronger choice for most workflows. Anthropic: Claude Opus 4.1 remains a solid alternative depending on your specific needs.
Best for with Anthropic: Claude Opus 4.1
Best for with OpenAI: GPT-5 Codex
Side-by-side
Technical specifications
| Anthropic: Claude Opus 4.1 | OpenAI: GPT-5 Codex | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input price | $15/M | $1/M |
| Output price | $75/M | $10/M |
| Context window | 200K | 400K |
| Max output | 32K | 128K |
| Capabilities | Tool useVisionReasoning | Tool useVisionReasoning |
| Released | Aug 5, 2025 | Sep 23, 2025 |
Scoring breakdown
How each dimension compares
Price
OpenAI: GPT-5 Codex leadsAnthropic: Claude Opus 4.1
$75/M tokens
OpenAI: GPT-5 Codex
$10/M tokens
Context Window
OpenAI: GPT-5 Codex leadsAnthropic: Claude Opus 4.1
200K tokens
OpenAI: GPT-5 Codex
400K tokens
Capabilities
Anthropic: Claude Opus 4.1
3/4
OpenAI: GPT-5 Codex
3/4
Max Output
OpenAI: GPT-5 Codex leadsAnthropic: Claude Opus 4.1
32K tokens
OpenAI: GPT-5 Codex
128K tokens
Recency
Anthropic: Claude Opus 4.1
Aug 2025
OpenAI: GPT-5 Codex
Sep 2025
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