Claude Sonnet 5.5 API price, and what each result really costs
Anthropic, listed 28 Sept 2026. Price checked 12 Nov 2026; unchanged since we started tracking it. Source: Anthropic's pricing page. anthropic/claude-sonnet-5.5
List price per million tokens
- Input
- $2.00
- Cached input
- $0.10
- Output
- $10.00
- Context window
- 1M tokens
Note: Cache hits priced at 0.05x input. Cache writes: 5m $2.50, 1h $4. Batch 50% off.
What it costs per task, and per task that works
Six common task shapes with typical token counts. The real cost counts the tries that get redone; the rates are examples, not measurements.
| Task | Per 1,000 tries | Per 1,000 that work, 8 in 10 | Per 1,000 that work, 6 in 10 | Per 1,000 that work, 4 in 10 |
|---|---|---|---|---|
| Support bot answer3,000 in / 300 out | $9.00 | $11.25 | $15.00 | $22.50 |
| Invoice field extraction2,500 in / 250 out | $7.50 | $9.38 | $12.50 | $18.75 |
| Lead scoring1,200 in / 100 out | $3.40 | $4.25 | $5.67 | $8.50 |
| Email reply draft1,500 in / 400 out | $7.00 | $8.75 | $11.67 | $17.50 |
| Translation900 in / 800 out | $9.80 | $12.25 | $16.33 | $24.50 |
| Search re-ranking4,000 in / 50 out | $8.50 | $10.63 | $14.17 | $21.25 |
Work out your own real cost per resultTest Claude Sonnet 5.5 on your own prompt
Compare Claude Sonnet 5.5 with
- Claude Sonnet 5$2.00 in / $10.00 outSwitch cost
- Claude Sonnet 4.6$3.00 in / $15.00 outSwitch cost
- GPT-6.1 Sol$2.00 in / $10.00 outSwitch cost
- Gemini 4 Argon$2.00 in / $10.00 outSwitch cost
- Kimi K3.1 Pro$2.00 in / $10.00 outSwitch cost
Worked-through switches: Claude Sonnet 4.5 → Claude Sonnet 5.5: cost and quality on real tasks, GPT-4o → Claude Sonnet 5.5: cost and quality on real tasks, GPT-6.1 Sol → Claude Sonnet 5.5: cost and quality on real tasks, Claude Sonnet 5.5 → GPT-6.1 Terra: cost and quality on real tasks, Claude Sonnet 5.5 → Gemini 3.8 Flash: cost and quality on real tasks, Claude Sonnet 5.5 → DeepSeek V4.1 Flash: cost and quality on real tasks, Claude Opus 5.5 → Claude Sonnet 5.5: cost and quality on real tasks, Claude Sonnet 5.5 → Claude Haiku 5.5: cost and quality on real tasks
Questions
How much does the Claude Sonnet 5.5 API cost?
$2.00 per million input tokens and $10.00 per million output tokens, or $0.10 per million for cached input. Price checked 12 Nov 2026; unchanged since we started tracking it.
What does a result that works really cost with Claude Sonnet 5.5?
A support bot answer (about 3,000 tokens in, 300 out) costs $0.009 per try. If 6 in 10 work first time, each answer that works really costs $0.015, because the redone ones were paid for too.