Claude Opus 4.5 with Jev
Claude Opus 4.5 is a model from Anthropic, released 2025-11-24. It costs $5.00 per million input tokens and $25 per million output tokens, reads up to 200K tokens of context, and writes up to 64,000 tokens in one reply. Through llm11, set model to anthropic/claude-opus-4.5.
- Input price
- $5.00 / 1M
- Output price
- $25 / 1M
- Context window
- 200K tokens
- Max output
- 64K tokens
- Cached input
- $0.500 / 1M
- Released
- 2025-11-24
- Accepts
- file, image, text
Read from the provider's prompt cache
Read from the live catalogue and refreshed daily. At blended list price, 5% of the 332 priced models we can call cost more.
Using Claude Opus 4.5 with Jev
Jev is TypeSafe AI's System One model. It reads each request first and decides which model in your pool answers, with a calibrated confidence on that call. Claude Opus 4.5 does the answering when Jev sends it work, or when you name it yourself. Claude Opus 4.5 falls in the llm11-smart band, and the labs and limits it meets make it eligible for that pack. Today it is one of the models in that pack's live pool.
Jev is new, so we have not published results for Claude Opus 4.5 with and without it, and this page does not invent any. Every response comes with a receipt that names the model that answered and what it cost against your most expensive model, so you can measure the pairing on your own traffic.
What a request costs
List price arithmetic, the same sum a receipt does. llm11 adds nothing per request; the only fee is on buying credits.
| Request | Tokens in / out | One | A thousand |
|---|---|---|---|
| Short chat turn | 500 / 200 | $0.00750 | $7.50 |
| Question over retrieved documents | 4,000 / 500 | $0.033 | $32.50 |
| Long document summary | 30,000 / 1,000 | $0.175 | $175.00 |
Cheaper models to try
The catalogue has no benchmark score for Claude Opus 4.5, so this is a price ordering. It does not claim these answer as well.
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Anthropic Claude Opus 5.5 | $4.00 | $20 | 1M | |
| OpenAI GPT-5.6 Sol Pro | $4.00 | $20 | 1.05M | |
| Qwen Qwen3.8 Max Prime | $4.00 | $12 | 1M | |
| Anthropic Claude Sonnet 4.6 | $3.00 | $15 | 1M |
Call it
Same OpenAI request shape. Naming the model pins it, so nothing is routed, and the answer is still checked.
python
from openai import OpenAI
client = OpenAI(base_url="https://www.llm11.com/v1", api_key="llm11_live_...")
res = client.chat.completions.create(
model="anthropic/claude-opus-4.5",
messages=[{"role": "user", "content": "Hello"}],
)More from Anthropic
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Claude Sonnet 5.5 | $2.00 | $10 | 1M | |
| Claude Opus 5.5 | $4.00 | $20 | 1M | |
| Claude Fable 5.1 | $10 | $50 | 1M | |
| Claude Opus 5 | $5.00 | $25 | 1M | |
| Claude Sonnet 5 | $2.00 | $10 | 1M | |
| Claude Fable 5 | $10 | $50 | 1M |
Questions
- What is Claude Opus 4.5 with Jev?
- Jev is TypeSafe AI's System One model. It reads each request first and decides which model in your pool answers, with a calibrated confidence on that call. Claude Opus 4.5 does the answering when Jev sends it work, or when you name it yourself. Claude Opus 4.5 falls in the llm11-smart band, and the labs and limits it meets make it eligible for that pack. Today it is one of the models in that pack's live pool. Routing decisions are made by Jev, TypeSafe AI's System One model.
- Is Claude Opus 4.5 a System One model?
- No. Claude Opus 4.5 answers requests. The System One model is Jev, which decides which model answers each one, so the two do different jobs and llm11 uses both.
- How much does Claude Opus 4.5 cost?
- $5.00 per million input tokens and $25 per million output tokens. A 4,000 token prompt with a 500 token answer costs about $0.033, so a thousand of them is about $32.50. llm11 passes provider list price through and charges 5% when you buy credits.
- What is the Claude Opus 4.5 context window?
- 200,000 tokens, with up to 64,000 tokens in a single reply.
- Does Claude Opus 4.5 support tool calling and structured output?
- The catalogue lists tool calling, structured output and reasoning controls.
- Can I use Claude Opus 4.5 through llm11?
- Yes. Set model to anthropic/claude-opus-4.5 on the OpenAI-compatible endpoint and the request goes to it directly, with verification still running.
- Does Jev route to Claude Opus 4.5?
- Routing decisions are made by Jev, TypeSafe AI's System One model. Claude Opus 4.5 falls in the llm11-smart band, and the labs and limits it meets make it eligible for that pack. Today it is one of the models in that pack's live pool.
- What is a cheaper alternative to Claude Opus 4.5?
- Nearest in price and below it: Anthropic Claude Opus 5.5 at $4.00 in and $20 out, OpenAI GPT-5.6 Sol Pro at $4.00 in and $20 out and Qwen Qwen3.8 Max Prime at $4.00 in and $12 out. The catalogue has no benchmark score for Claude Opus 4.5, so this is a price ordering. It does not claim these answer as well.