Claude Opus 5.5 vs Claude Sonnet 5.5
Claude Sonnet 5.5 costs less on both: $1.20 in and $3.00 out per million tokens, against $2.10 in and $6.00 out for Claude Opus 5.5. Both on one key at UplinkSwitch, each next to its developer's list price.
Prices · per million tokens, USD
| Tokens | Claude Opus 5.5claude-opus-5-5 | Claude Sonnet 5.5claude-sonnet-5-5 |
|---|---|---|
| Input | $2.10Anthropic lists $4.00 · 47% under | $1.20Anthropic lists $2.00 · 40% under |
| Cached input | $0.12Anthropic lists $0.20 · 40% under | $0.075Anthropic lists $0.10 · 25% under |
| Output | $6.00Anthropic lists $20.00 · 70% under | $3.00Anthropic lists $10.00 · 70% under |
| Formats | Anthropic SDK, OpenAI SDK | Anthropic SDK, OpenAI SDK |
| Developer | Anthropic | Anthropic |
List price: each developer's published rate, read October 2026. A model with no cached rate bills cached tokens at its input rate. Live from GET https://api.uplinkswitch.com/v1/catalog.
Same key, same URL
One base URL and one key serve both models. The request below calls Claude Opus 5.5; put claude-sonnet-5-5 in the model field to call Claude Sonnet 5.5 instead.
shell
curl https://api.uplinkswitch.com/v1/chat/completions \
-H "authorization: Bearer sk-uplink-live-..." \
-H "content-type: application/json" \
-d '{"model":"claude-opus-5-5","messages":[{"role":"user","content":"Hello"}]}'Model pages: Claude Opus 5.5, Claude Sonnet 5.5. Pricing by family: Claude. More comparisons: Claude Opus 5.5 vs GPT-6.1 Sol, Claude Opus 5.5 vs Gemini 3.1 Pro Preview, DeepSeek V4 Pro 0813 vs Claude Opus 5.5, Claude Sonnet 5.5 vs GPT-6.1 Sol.
Questions
- Which costs less, Claude Opus 5.5 or Claude Sonnet 5.5?
- Claude Sonnet 5.5 costs less on both: $1.20 in and $3.00 out per million tokens, against $2.10 in and $6.00 out for Claude Opus 5.5.
- Can I switch between them by changing the model id?
- Yes. Both answer in the Anthropic SDK and OpenAI SDK format at the same base URL with the same key. Change the model id from claude-opus-5-5 to claude-sonnet-5-5 and nothing else.
- Is there a subscription?
- No. Prepaid credit from $10, with no subscription or monthly fee. Each top-up locks your prices for 30 days.