Compare models
Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.
| Attribute | Claude Opus 4.8 (Fast)claude-opus-4-8-fast | GPT-6 Astra Progpt-6-astra-pro |
|---|---|---|
| Pricing | ||
| Input | $10.00 / 1M | $10.00 / 1M |
| Output | $50.00 / 1M | $50.00 / 1M |
| Cache Write (5m) | $12.50 / 1M | $10.00 / 1M |
| Cache Write (1h) | $20.00 / 1M | $10.00 / 1M |
| Cache Read | $1.00 / 1M | $10.00 / 1M |
| Web Search | $0 / 1M | $0 / 1M |
| Context | ||
| Max context | 1M | 1M |
| Max output | N/A | N/A |
| Capabilities | ||
| Vision | Yes | Yes |
| Function Calling | Yes | Yes |
| JSON Mode | Yes | Yes |
| Streaming | Yes | Yes |
| Catalogue | ||
| Provider | Anthropic | OpenAI |
| Category | chat | chat |
| Charge type | Pay As You Go | Pay As You Go |
| Released | — | — |
| Description | ||
| Summary | This is the fast version of Opus 4.8 | GPT-6 Astra Pro uses the same underlying model as GPT-6 Astra, but runs with reasoning.mode set to pro for higher-quality responses on complex tasks. Optimized for deeper reasoning, greater accuracy, and more reliable multi-step execution, it is well suited for demanding coding, analysis, and agentic workflows where solution quality takes priority over speed and cost. |