GPT-5.4 vs Claude Opus 5
For coding: GPT-5.4. For document analysis and long context: Claude Opus 5.
GPT-5.4 and Claude Opus 5 are the two best reasoning models available. GPT-5.4 edges ahead on code generation and strict JSON schema adherence. Opus 5 wins on document analysis, nuanced writing, and anything requiring 200K context. Price: GPT-5.4 is 6× cheaper on input, comparable on output.
Side-by-side pricing
| GPT-5.4 | Claude Opus 5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input price/1M | $2.50 | $5.00 |
| Output price/1M | $15.00 | $25.00 |
| Cache read/1M | $0.25 | $0.50 |
| Context window | 1M | 200K |
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Prompt caching | ✓ | ✓ |
| Speed tier | Standard | Slow |
Prices verified 2026-08-20. See changelog for history.
Winner by task
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Frequently Asked Questions
Which is better: GPT-5.4 or Claude Opus 5?
It depends on the task. For coding, use GPT-5.4. For document analysis and writing, use Claude Opus 5. If you're unsure, GPT-5.4 is the better default because it's 6× cheaper on input and covers most use cases.
Is Claude Opus 5 worth the higher price?
Only if your tasks genuinely need it. Run your eval suite on Claude Sonnet 5 first — it's 5× cheaper than Opus 5 and handles 85%+ of professional tasks at comparable quality.
Prices verified 2026-08-20. See methodology for calculation details.