Model comparison
GPT-5.4 vs Claude Opus 4.8
OpenAI
GPT-5.4
OpenAI's flagship - broadest modality and ecosystem coverage.
Anthropic
Claude Opus 4.8
Anthropic's heavyweight for hard reasoning and agentic work.
Specs
| Metric | GPT-5.4 | Claude Opus 4.8 |
|---|---|---|
| Context window | 1.1M tokens↑ | 1M tokens |
| Input $/1M tokens | $2.50↑ | $5.00 |
| Output $/1M tokens | $15.00↑ | $25.00 |
| Modalities | Text · Image · File | Text · Image |
| Open weights | No | No |
| Released | Mar 2026 | May 2026 |
Key differences
- -GPT-5.4 offers 1.1M context; Claude Opus 4.8 offers 1M.
- -Input pricing: GPT-5.4 at $2.50/1M vs Claude Opus 4.8 at $5.00/1M.