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Swiss AI: Apertus 8B Instruct

Swiss AI: Apertus 8B Instruct

bySwiss AI

Apertus 8B Instruct is a language model from Swiss AI released on Sep 2, 2025. It reads text and writes text, with a 66K token context window and up to 8K tokens per reply.

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It costs $0.10 per million input tokens and $0.20 per million output tokens.

It supports tool calling, and its weights are open, so you can host it yourself.

Modalities
In / out price
$0.10 / $0.20 per 1M
Context
66K
Max output
8K
Released
Sep 2, 2025
Knowledge cutoff
Sep 2025
  • Tool calling
  • Structured output
  • Reasoning
  • Prompt caching
  • Open weights
  • Free to use

Apertus 8B Instruct pricing

USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.

Input$0.10 / 1M tokens
Output$0.20 / 1M tokens

What Apertus 8B Instruct costs per month

Pick a workload close to yours or type your own volumes.

Apertus 8B Instruct per month
$9.60
Without caching
$9.60
Per request
$0.0003

Supported request parameters

What you can set when you call Apertus 8B Instruct through an OpenAI compatible API.

  • Toolstools
  • Temperaturetemperature

Alternatives to Apertus 8B Instruct

Models that take the same inputs and call tools, closest in price, cheaper ones first.

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    by mistralaiDec 2, 2025131K context$0.10/M input tokens$0.10/M output tokens9 providers

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    by metaSep 2, 2026$0.10/M input tokens$0.20/M output tokens6 providers

  • Liquid AI: LFM2.5 2.6B

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    by liquidAug 11, 2026$0.10/M input tokens$0.20/M output tokens2 providers

  • Meta: Muse Spark 1.2 Contributor

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    by metaAug 5, 2026$0.10/M input tokens$0.20/M output tokens6 providers

  • Poolside: Laguna S 2.1

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    by poolsideJul 21, 2026$0.10/M input tokens$0.20/M output tokens6 providers

  • Poolside: Laguna XS 2.1

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    by poolsideJul 2, 2026$0.10/M input tokens$0.20/M output tokens4 providers

More from Swiss AI

  • Apertus v1.5 70B

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    by swiss-aiJul 24, 2026$0.87/M input tokens$3.10/M output tokens

  • Apertus 70B Instruct

    Reads text. Tool calling. Served by 3 providers.

    by swiss-aiSep 2, 2025$0.82/M input tokens$2.92/M output tokens3 providers

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Apertus 8B Instruct questions

How much does the Apertus 8B Instruct API cost?

$0.10 per million input tokens and $0.20 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.

What is the context window of Apertus 8B Instruct?

65,536 tokens of input, and it can write up to 8,192 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.

Does Apertus 8B Instruct support tool calling?

Yes. It accepts tool definitions, which is what an agent needs to call your APIs.

Is Apertus 8B Instruct open source?

Its weights are published, so you can run it on your own hardware or a cloud of your choice. Read the license before commercial use.

When was Apertus 8B Instruct released?

Sep 2, 2025, with training data up to Sep 2025.

Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.