GPT-6 Astra vs Claude Opus 5.5 API pricing
Claude Opus 5.5 is cheaper on every example workload below. Prices last checked 2026-10-13.
| GPT-6 Astra (OpenAI) | Claude Opus 5.5 (Anthropic) | |
|---|---|---|
| Input $/1M tokens | $10.0 | $4.0 |
| Output $/1M tokens | $50.0 | $20.0 |
| Context | — | — |
| Our tier (1–4) | 4 | 4 |
Example monthly bills
| Workload | GPT-6 Astra | Claude Opus 5.5 | Cheaper |
|---|---|---|---|
| Chat / Q&A 10M in / 2M out per month | $200.00 | $80.00 | Claude Opus 5.5 saves $120.00/mo (60%) |
| Coding 20M in / 5M out per month | $450.00 | $180.00 | Claude Opus 5.5 saves $270.00/mo (60%) |
| Output-heavy (reasoning, long answers) 10M in / 10M out per month | $600.00 | $240.00 | Claude Opus 5.5 saves $360.00/mo (60%) |
Fine print
- GPT-6 Astra: ≤272K input; long context $20/$75
Cost only, not quality. “Tier” is our rough capability judgment, not a benchmark, and different tokenizers count the same text differently. Reasoning models may bill extra thinking tokens as output. Official sources: OpenAI, Anthropic.
See all models on the full price table, the OpenAI and Anthropic pricing pages, or try the savings calculator with your own numbers.