Claude Sonnet 4 with Jev
Claude Sonnet 4 is a model from Anthropic, released 2025-05-22. It costs $3.00 per million input tokens and $15 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-sonnet-4.
- Input price
- $3.00 / 1M
- Output price
- $15 / 1M
- Context window
- 200K tokens
- Max output
- 64K tokens
- Cached input
- $0.300 / 1M
- Released
- 2025-05-22
- Accepts
- image, text, file
Read from the provider's prompt cache
Read from the live catalogue and refreshed daily. At blended list price, 8% of the 332 priced models we can call cost more.
Using Claude Sonnet 4 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 Sonnet 4 does the answering when Jev sends it work, or when you name it yourself. At list price Claude Sonnet 4 falls in the llm11-smart band, but no pack routes to it because it does not advertise structured output, which the verification checks rely on. You can still pin it: pass anthropic/claude-sonnet-4 as model and routing steps aside while verification still runs.
Jev is new, so we have not published results for Claude Sonnet 4 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 | $0.00450 | $4.50 |
| Question over retrieved documents | 4,000 / 500 | $0.019 | $19.50 |
| Long document summary | 30,000 / 1,000 | $0.105 | $105.00 |
Cheaper models to try
The catalogue has no benchmark score for Claude Sonnet 4, so this is a price ordering. It does not claim these answer as well.
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| OpenAI GPT-5.4 | $2.50 | $15 | 1.05M | |
| OpenAI GPT-5.3-Codex | $1.75 | $14 | 400K | |
| OpenAI GPT-5.2-Codex | $1.75 | $14 | 400K | |
| OpenAI GPT-5.2 | $1.75 | $14 | 400K |
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-sonnet-4",
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 Sonnet 4 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 Sonnet 4 does the answering when Jev sends it work, or when you name it yourself. At list price Claude Sonnet 4 falls in the llm11-smart band, but no pack routes to it because it does not advertise structured output, which the verification checks rely on. You can still pin it: pass anthropic/claude-sonnet-4 as model and routing steps aside while verification still runs. Routing decisions are made by Jev, TypeSafe AI's System One model.
- Is Claude Sonnet 4 a System One model?
- No. Claude Sonnet 4 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 Sonnet 4 cost?
- $3.00 per million input tokens and $15 per million output tokens. A 4,000 token prompt with a 500 token answer costs about $0.019, so a thousand of them is about $19.50. llm11 passes provider list price through and charges 5% when you buy credits.
- What is the Claude Sonnet 4 context window?
- 200,000 tokens, with up to 64,000 tokens in a single reply.
- Does Claude Sonnet 4 support tool calling and structured output?
- The catalogue lists tool calling and reasoning controls, but it does not list structured output.
- Can I use Claude Sonnet 4 through llm11?
- Yes. Set model to anthropic/claude-sonnet-4 on the OpenAI-compatible endpoint and the request goes to it directly, with verification still running.
- Does Jev route to Claude Sonnet 4?
- Routing decisions are made by Jev, TypeSafe AI's System One model. At list price Claude Sonnet 4 falls in the llm11-smart band, but no pack routes to it because it does not advertise structured output, which the verification checks rely on. You can still pin it: pass anthropic/claude-sonnet-4 as model and routing steps aside while verification still runs.
- What is a cheaper alternative to Claude Sonnet 4?
- Nearest in price and below it: OpenAI GPT-5.4 at $2.50 in and $15 out, OpenAI GPT-5.3-Codex at $1.75 in and $14 out and OpenAI GPT-5.2-Codex at $1.75 in and $14 out. The catalogue has no benchmark score for Claude Sonnet 4, so this is a price ordering. It does not claim these answer as well.