Custom Comparison
Compare 2 AI Models
GPT-6 Astra vs Claude Opus 5.5
GPT-6 AstraOpenAI
Claude Opus 5.5Anthropic
Up to 3 models. Every selection is in the address bar, so the comparison is a link you can send.
Interactive Comparison
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$10 / $50 per 1M tokens | $4 / $20 per 1M tokens | |
|---|---|---|
| Identity | ||
| Developer | OpenAI | Anthropic |
| Released | Sep 2026 | Sep 2026 |
| Status | GA | GA |
| Licence | Proprietary | Proprietary |
| Self-hostable | No | No |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $20.000 / 1M tokens | $8.000 / 1M tokens |
| Input price | $10.000 / 1M tokens | $4.000 / 1M tokens |
| Output price | $50.000 / 1M tokens | $20.000 / 1M tokens |
| Cached input | $1 per 1M tokens | $0.20 per 1M tokens |
| Batch discount | 50% (Batch and Flex) | 50% ($2 / $10 per 1M tokens) |
| Capacity | ||
| Context window | 1,050,000 tokens | 1M tokens |
| Max output | 128k tokens | 128k tokens |
| Capability | ||
| Vision in | Yes | Yes |
| Audio in | No | No |
| Function calling | — | Yes |
| Structured output | — | Yes |
| Extended reasoning | — | Yes |
| Web search | — | Yes |
| Code execution | — | Yes |
| Access | ||
| API | Yes | Yes |
| Chat app | Yes | Yes |
| Cloud marketplaces | — | Amazon Bedrock, Google Cloud, Microsoft Foundry |
| Fine-tuning | — | No |
| Measured quality | ||
| LMArena Elo | 1476 (checked Oct 2026) | 1504 (checked Oct 2026) |
| LMArena rank | Rank 30 | Rank 4 |
| GPQA Diamond | 96 | — |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 74 | 188 |
