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