Claude Opus 5.5 vs Claude Sonnet 5.5: API cost
Standard, cached and batch API prices for Claude Opus 5.5 (Anthropic) and Claude Sonnet 5.5 (Anthropic), and what each costs for your usage.
Claude Sonnet 5.5 is cheaper than Claude Opus 5.5 at standard rates, with 2× cheaper input and 2× cheaper output.
- Input $120.00
- Cached input $6.00
- Output $180.00
- Input $60.00
- Cached input $3.00
- Output $90.00
Show as a table
| Output tokens | Claude Opus 5.5 | Claude Sonnet 5.5 |
|---|---|---|
| 0 | $4.00 | $2.00 |
| 250 | $9.00 | $4.50 |
| 500 | $14.00 | $7.00 |
| 750 | $19.00 | $9.50 |
| 1,000 | $24.00 | $12.00 |
| Token type | Claude Opus 5.5 | Claude Sonnet 5.5 | |
|---|---|---|---|
| Input | $4 | $2 | Claude Sonnet 5.5 is 2× cheaper |
| Cached input | $0.20 | $0.10 | Claude Sonnet 5.5 is 2× cheaper |
| Output | $20 | $10 | Claude Sonnet 5.5 is 2× cheaper |
| Batch input | $2 | $1 | Claude Sonnet 5.5 is 2× cheaper |
| Batch cached input | $0.10 | $0.05 | Claude Sonnet 5.5 is 2× cheaper |
| Batch output | $10 | $5 | Claude Sonnet 5.5 is 2× cheaper |
| Workload | Claude Opus 5.5 | Claude Sonnet 5.5 |
|---|---|---|
Support chatbot 2,000 in / 300 out tokens,
1,000 requests a day, 50% cached | $306.00 | $153.00 |
Document summaries 10,000 in / 800 out tokens,
200 requests a day | $336.00 | $168.00 |
Tagging / classifying 400 in / 20 out tokens,
20,000 requests a day | $1,200 | $600.00 |
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Or see Claude Opus 5.5 pricing, Claude Sonnet 5.5 pricing, or compare any two models.
FAQ
Frequently asked questions
Is Claude Opus 5.5 cheaper than Claude Sonnet 5.5?
Claude Sonnet 5.5 is cheaper than Claude Opus 5.5 at standard rates, with 2× cheaper input and 2× cheaper output. Based on standard API rates last checked on Oct 13, 2026.
How much do Claude Opus 5.5 and Claude Sonnet 5.5 cost per million tokens?
Claude Opus 5.5: $4 per million input tokens and $20 per million output tokens. Claude Sonnet 5.5: $2 input and $10 output. These are standard rates in USD, before tax, from each provider’s own pricing page.
Which is cheaper with the Batch API?
Claude Opus 5.5’s batch rates are $2 input and $10 output per million tokens (50% off); Claude Sonnet 5.5’s batch rates are $1 input and $5 output per million tokens (50% off).
Does prompt caching change the comparison?
Claude Opus 5.5 charges $0.20 per million cached input tokens, against $4 for normal input; Claude Sonnet 5.5 charges $0.10 per million cached input tokens, against $2 for normal input. Cache write and storage charges are extra and aren’t included here.