Anthropic: Claude Opus 5
Model details
- Model
anthropic/claude-opus-5- Provider
openrouter- API
anthropic-messages- Base URL
https://openrouter.ai/api- Input
- text, image
- Reasoning
- Yes
- Context window
- 1,000,000
- Max tokens
- 128,000
Show configuration
{
"providers": {
"openrouter": {
"apiKey": "YOUR_API_KEY",
"models": [
{
"id": "anthropic/claude-opus-5",
"name": "Anthropic: Claude Opus 5",
"reasoning": true,
"input": [
"text",
"image"
],
"thinkingLevelMap": {
"off": "none",
"minimal": null,
"low": "low",
"medium": "medium",
"high": "high",
"xhigh": "xhigh",
"max": "max"
},
"contextWindow": 1000000,
"maxTokens": 128000,
"cost": {
"input": 5,
"output": 25,
"cacheRead": 0.5,
"cacheWrite": 6.25
},
"compat": {
"forceAdaptiveThinking": true,
"supportsTemperature": false
}
}
],
"api": "anthropic-messages",
"baseUrl": "https://openrouter.ai/api"
}
}
}Pricing
USD per million tokens. A tier is selected from the total input tokens in each request and applies to that entire request.
| Request input | Input | Output | Cache read | Cache write |
|---|---|---|---|---|
| All requests | $5 | $25 | $0.5 | $6.25 |
Session cost calculator
Estimate the requests made during an agent session. A user turn can make several model calls while using tools, so costs are calculated per model request.
Estimated session$0.00
- Uncached input
- —
- Cache reads
- —
- Uncached prefixes
- —
- Cache writes
- —
- Output
- —
- Without caching
- —
The first request starts cold unless marked otherwise. Output is billed separately from context growth because reasoning tokens are not always retained. This remains a directional estimate: providers differ in eligibility, rounding, and retention.
Compatibility flags
Effective values after applying Pi's API defaults and model overrides.
| Feature | Value |
|---|---|
supportsEagerToolInputStreaming | Yes |
supportsLongCacheRetention | Yes |
sendSessionAffinityHeaders | No |
supportsCacheControlOnTools | Yes |
supportsTemperature | No |
forceAdaptiveThinking | Yes |
allowEmptySignature | No |