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Model cost comparisonClaude Sonnet 5.5 vs GPT-6.1 Terra: Cost
Claude Sonnet 5.5 and GPT-6.1 Terra side by side, using prices from each provider's own pricing page.
At list price, GPT-6.1 Terra costs about 2.0x less per typical request than Claude Sonnet 5.5.
Price per token
| USD per 1M tokens | Claude Sonnet 5.5 | GPT-6.1 Terra |
|---|---|---|
| Input | $2.00 | $1.00 |
| Cached input / cache reads | $0.10 | $0.05 |
| Output | $10.00 | $5.00 |
| Batch input | $1.00 | $0.50 |
| Batch output | $5.00 | $2.50 |
| 1,000 typical requests | $8.00 | $4.00 |
| 1M typical requests a month | $8,000 | $4,000 |
A typical request here is 2,000 input and 400 output tokens. Prices checked October 30, 2026.
Which is cheaper?
At list price, GPT-6.1 Terra is about 2.0x cheaper than Claude Sonnet 5.5 for the same typical request. But price per token isn't cost per task. What matters is the cost of a successful result: a cheaper model that needs retries, longer prompts or more output can end up costing more.
How to decide
- Pick 50 to 200 real requests and the answers you'd accept.
- Run both models on them and record pass rate, tokens used and latency.
- Divide total cost by the number of passing answers: that's your cost per successful task.
- Route each kind of request to the model with the lowest cost per successful task.
Use both
You don't have to choose one. apicuts routes each request to the lowest-cost model that passes your evaluations, with your approval, and guarantees at least 20% lower cost after our fee. See how routing works.
Frequently asked questions
Is Claude Sonnet 5.5 cheaper than GPT-6.1 Terra?
Per typical request at list price, GPT-6.1 Terra is cheaper: $4.00 vs $8.00 per 1,000 requests of 2,000 input and 400 output tokens.
Should I switch from Claude Sonnet 5.5 to GPT-6.1 Terra?
Only for the requests where it passes your quality checks. Test on your own evaluation set first, then route the requests that pass.
Sources: Anthropic's pricing page, OpenAI's API pricing page. Checked October 30, 2026.
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