Claude Opus 5.5 vs gpt-6-astra
For 1M input + 1M output tokens, Claude Opus 5.5 costs $24.00 and gpt-6-astra costs $60.00. Claude Opus 5.5 is 2.5× cheaper.
| Per 1M tokens | Claude Opus 5.5 | gpt-6-astra |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input | $4.00 | $10.00 |
| Output | $20.00 | $50.00 |
| Cached input | $0.20 | $1.00 |
| Context | 1M | — |
| Verified | 2026-10-15 | 2026-10-15 |
| Pricing | variable pricing | variable pricing |
Notes: Claude Opus 5.5: Cached = cache hit price. 5m cache writes cost 1.25x input. gpt-6-astra: Standard tier, short context (<=272K input). Long-context rates are higher.
Calculate your cost
| Provider | Model | Cost |
|---|---|---|
| Anthropic | Claude Opus 5.5 | $9.00 |
| OpenAI | gpt-6-astra | $22.50 |
Uses standard list prices (no caching, batch or off-peak discounts). € and CHF rows are priced in that currency by the provider and not converted, so compare them with care.