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Claude Opus 5.5 API price
anthropic/claude-opus-5.5
The cheapest Claude Opus 5.5 API is $4.00/M input at Official - Anthropic - all 2 providers compared below, per 1M tokens.
FlagshipAnthropic1M context2 sellers
Input
$4.00
per 1M tokens · Official - Anthropic
Output
$20.00
per 1M tokens · Official - Anthropic
Where to buy it
Cheapest Claude Opus 5.5 API providers compared - 2 sellers, from $4.00/M.
Cost calculator
| Provider | Input $/M | Output $/M | Cached in | Your cost |
|---|---|---|---|---|
| Official - Anthropic | 4.00cheapest | 20.00 | 0.200 | |
| Batch | 2.00 | 10.00 | - | |
| Fast mode | 8.00 | 40.00 | - | |
| OpenRouter (aggregator) | 4.00 | 20.00 | 0.200 | |
| Batch | 2.00 | 10.00 | 0.100 |
Against its tier
- This model$24.00
- Cheapest · GLM 5.3 Flash$0.29
- Tier median · Gemini 3.1 Pro$11.90
- Dearest · GPT 5.5 Pro (04-23 snapshot)$210.00
#28 of 40 flagship · cheaper than 31%
Details
- Context window
- 1M1,000,000 tokens
- Developer
- Anthropic
- Intelligence
- 57.6Adaptive Reasoning, Max Effort, Default Fallback
- Sellers
- 2
- Cached input
- $0.20where the source publishes one
- Cheapest at
- Official - Anthropic
- Combined
- $24.00in + out per 1M
- Last checked
- 2026-09-22