Anthropic API · verified September 25, 2026
Claude Opus 5.5 API pricing: $4 in / $20 out
New Opus; cheaper than Opus 5.
Input /1M$4
Output /1M$20
Context1M
ReleasedSep 22, 2026
What real jobs cost
| 1,000 short chats | $11.20 |
| Summarise 100 long reports (20k tokens each) | $10.00 |
| Write a 90,000-word book | $2.48 |
| 10M input + 2M output tokens | $80.00 |
Estimates at the listed price. Use the calculator for your own numbers.
Similar-priced models
| Model | In | Out |
|---|---|---|
| GPT-6 Sol OpenAI | $2 | $10 |
| GPT-5.6 Terra OpenAI | $2 | $12 |
| Gemini 3.1 Pro Google | $2 | $12 |
| GPT-5.6 Sol OpenAI | $4 | $20 |
| Claude Opus 5 Anthropic | $5 | $25 |
| Claude Opus 4.8 Anthropic | $5 | $25 |
Price history
No price or plan changes recorded since we started tracking. We re-check every week.
Other Anthropic models
- Claude Fable 5.1 $10 / $50
- Claude Opus 5 $5 / $25
- Claude Opus 4.8 $5 / $25
- Claude Sonnet 5 $2 / $10
- Claude Haiku 4.5 $1 / $5
Claude Opus 5.5 pricing questions
How much does Claude Opus 5.5 cost?
$4 per million input tokens and $20 per million output tokens, with a 1M context window. New Opus; cheaper than Opus 5.
How much does 1,000 chats cost on Claude Opus 5.5?
About $11.20, assuming 800 input and 400 output tokens per chat.
Is there a cheaper alternative to Claude Opus 5.5?
GPT-5.6 Terra ($2 / $12) costs about 44% less on a typical 3:1 input/output mix. Test whether its quality is enough for your task.
Sources
Checked against the official pages below on September 25, 2026. Prices are USD before local tax. See how we verify prices and the change log.