Comparison · prices as of 2026-07-04
Claude Opus 4.5 vs GPT-5 mini
On price alone, GPT-5 mini (OpenAI) runs about 93% cheaper than Claude Opus 4.5 for a typical chat workload (2K input + 500 output tokens, 1,000 requests/day). Whether that's the right trade depends on the capability gap — pricing below, verify quality on your own evals.
| Spec | Claude Opus 4.5 | GPT-5 mini |
|---|---|---|
| Input / MTok | $5 | $0.25 |
| Output / MTok | $25 | $2 |
| Context window | 200K | 400K |
| Max output | 64K | 128K |
| Class | frontier | workhorse |
| Reference workload / month | $675.00 | $45.00 |
Sources: Anthropic pricing · OpenAI pricing. Run your own numbers in the cost calculator.