claude-sonnet-5-5 vs gpt-6.1-sol
claude-sonnet-5-5 vs gpt-6.1-sol: $2/$10 vs $2/$10 per 1M, the same workload priced on both; claude-sonnet-5-5 is 0% cheaper per request.
| claude-sonnet-5-5 | gpt-6.1-sol | |
|---|---|---|
| Provider · tier | anthropic · mid | openai · mid |
| Input | $2 | $2 |
| Cached input | $0.1 | $0.1 |
| Cache write | $2.5 | $2.5 |
| Output | $10 | $10 |
| Long-context tier | none | > 272,000: $4 / $15 |
| Per request (2,000 in / 300 out) | $0.007 | $0.007 |
| Per month at 100k requests | $700 | $700 |
| …with the static prefix cached | $415 | $415 |
| Cheaper sibling (cascade) | claude-haiku-5-5 | gpt-6-luna |
Through TokenZero
Point your SDK at the gateway and keep both keys; the cache formatter, response cache and advisory routing act on every request, and each one comes back with a signed receipt showing the list-price baseline, actual cost and the saving.
OPENAI_BASE_URL=https://tokenzero.sh/w/<key>/v1 ANTHROPIC_BASE_URL=https://tokenzero.sh/w/<key>
Questions
Which is cheaper, claude-sonnet-5-5 or gpt-6.1-sol?
At list prices (table 2026-10-26) claude-sonnet-5-5 is 0% cheaper per request on a 2,000-in / 300-out workload. Quality is a separate question: TokenZero's cascade only routes to a sibling it scores as sufficient and measures parity with shadow evaluation.
Where do these prices come from?
The providers' own pricing pages, re-verified on 2026-10-26; the gateway signs receipts with the same table.