Compare models
GPT-4o vs Claude Opus 5 vs Claude Sonnet 5
Every figure below carries the source that reported it and the moment it was observed. Values that failed validation are withheld rather than shown, and a dash means no source we track carries that field for that model.
| Field | GPT-4o | Claude Opus 5 | Claude Sonnet 5 |
|---|---|---|---|
| Context window | 128,000Synced from sourceCurrent4h ago | 1,000,000 (highest of the compared values)Synced from sourceCurrent4h ago | 1,000,000 (highest of the compared values)Synced from sourceCurrent4h ago |
| Input, $/M tokens | 2.5Synced from sourceCurrent4h ago | 5Synced from sourceCurrent4h ago | 2 (lowest of the compared values)Synced from sourceCurrent4h ago |
| Modality | textSeeded, unreviewedwritten 1mo ago | textSeeded, unreviewedwritten 1mo ago | textSeeded, unreviewedwritten 1mo ago |
| Licence | proprietarySeeded, unreviewedwritten 1mo ago | proprietarySeeded, unreviewedwritten 1mo ago | proprietarySeeded, unreviewedwritten 1mo ago |
| OpenRouter id | openai/gpt-4oSynced from sourceCurrent4h ago | anthropic/claude-opus-5Synced from sourceCurrent4h ago | anthropic/claude-sonnet-5Synced from sourceCurrent4h ago |
| Output, $/M tokens | 10Synced from sourceCurrent4h ago | 25Synced from sourceCurrent4h ago | 10Synced from sourceCurrent4h ago |
| Vendor | OpenAISeeded, unreviewedwritten 1mo ago | AnthropicSeeded, unreviewedwritten 1mo ago | AnthropicSeeded, unreviewedwritten 1mo ago |
Sources: Hugging Face Hub, OpenRouter model catalogue. Most recent observation 4h ago. Where a row is marked, ▲ is the highest of the values shown and ▼ the lowest — arithmetic on the figures above, not a ranking or a recommendation. Rows where neither extreme is meaningful are left unmarked rather than given a direction they do not have.
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