Apertus 8B Instruct 2509 API
Swiss-ai's Apertus 8B Instruct 2509 costs $0.100 per million input tokens and $0.200 per million output tokens from 1 independent provider. Each request through the OpenAI-compatible API goes to the offer with the lowest estimated charge that meets your rules.
- Providers compete for each request. The exchange ranks the offers that meet your rules by estimated charge. It fixes your maximum charge before the first token, and you pay for the tokens that the model uses.
- The OpenAI and Anthropic APIs. Use the OpenAI or Anthropic SDK that you have. Set the base URL and your key, and send apertus-8b-instruct-2509 as the model.
- Your data rules. Send x-liquid-retention: none and only offers whose provider does not keep your content compete for the request.
About Apertus 8B Instruct 2509
Apertus 8B Instruct 2509 is a language model from Swiss-ai. It takes text and gives text. The largest offer takes 32,768 input tokens. 1 independent provider quotes it on this exchange now.
Facts
- Model name
- apertus-8b-instruct-2509
- Maker
- Swiss-ai
- Context window
- 32.8K tokens
- Input price
- $0.100 per million tokens
- Output price
- $0.200 per million tokens
- Providers
- 1 independent provider
- Regions
- us
Providers
- Architect: us, $0.100 input and $0.200 output per million tokens, $0.100 cache read per million tokens, 32.8K tokens of context
Scores
- HLE: 5.0, #340 of 465
- GPQA: 25.6, #430 of 432
- AA-LCR: 0.0, #396 of 409
- Terminal-Bench Hard: 0.0, #305 of 311
- τ²-Bench: 11.4, #302 of 313
- IFBench: 22.4, #317 of 321
Scores: Artificial Analysis (https://artificialanalysis.ai/)
Request
curl https://router.inference.ai.exchange/v1/chat/completions \
-H "Authorization: Bearer $LIQUID_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "apertus-8b-instruct-2509",
"messages": [{"role":"user","content":"Say hello."}]
}'Questions
- What is Apertus 8B Instruct 2509?
- Apertus 8B Instruct 2509 is a language model from Swiss-ai.
- How much does Apertus 8B Instruct 2509 cost?
- Offers now ask $0.100 per million input tokens and $0.200 per million output tokens. A job pays for the tokens it uses. The exchange picks the cheapest eligible offer.
- What is the context length of Apertus 8B Instruct 2509?
- The largest offer takes 32,768 input tokens. A smaller offer can take less. The exchange skips an offer that cannot take your message.
- What can Apertus 8B Instruct 2509 do?
- Its providers list Reasoning effort, JSON object, JSON schema, Frequency penalty, Logit bias, Log probabilities, Min-p sampling, Presence penalty, Repetition penalty, Seed, Stop sequences, Top-k sampling, Top-p sampling, Text, Tools.
- What inputs and outputs does Apertus 8B Instruct 2509 support?
- Text → Text.
- Which providers serve Apertus 8B Instruct 2509?
- 1 independent provider quote it now, with 1 offer. The table above ranks them by the cost of a typical job.
- How do I call Apertus 8B Instruct 2509?
- Send "apertus-8b-instruct-2509" as the model in an OpenAI or Anthropic request. The API section links to setup steps for each client.
- When was Apertus 8B Instruct 2509 listed?
- The exchange first listed it on 11/11/2026. This is not its release date.