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Apertus 1.5 70B
About Apertus 1.5 70B
Apertus 1.5 70B is an AI model developed by Swiss AI, in the multimodal category, released in 2026, made available as an open-source model with 70B params. Swiss AI's Apertus 1.5 70B is a continued pretraining of Apertus 1.0, adding 2T multimodal tokens. Adds image understanding, optional thinking mode, 4x longer context window, improved instruction-following, and better tool use.
On this page you'll find Apertus 1.5 70B's full specifications, including a context window of 262.1K tokens. Review provider pricing and benchmark scores below, or compare Apertus 1.5 70B head-to-head with other multimodal models.
Run Apertus 1.5 70B locally — what to buy
Share this build ↗Sized to what Apertus 1.5 70B actually needs (~262k context at Q4), not to the biggest GPU: Good = cheapest that runs it, Better = best value, Best = most headroom. Speed is a hardware estimate; anything past ~120 tok/s is shown as instant.
Software support
✓ measured · · compatible · — not supported. Informational only — speed is hardware-based.
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Frequently asked questions
What is Apertus 1.5 70B? ▶
Swiss AI's Apertus 1.5 70B is a continued pretraining of Apertus 1.0, adding 2T multimodal tokens. Adds image understanding, optional thinking mode, 4x longer context window, improved instruction-following, and better tool use. It is tracked on GenAIList with its specifications, benchmark scores and provider pricing.
Who created Apertus 1.5 70B? ▶
Apertus 1.5 70B was developed by Swiss AI and released in 2026.
Is Apertus 1.5 70B open source or proprietary? ▶
Apertus 1.5 70B is released as open source — its weights are publicly available to download, run locally and fine-tune.
What is Apertus 1.5 70B's context window? ▶
Apertus 1.5 70B supports a context window of 262.1K tokens, and has 70B params.
How much does Apertus 1.5 70B cost? ▶
Pricing for Apertus 1.5 70B depends on the provider. See the providers table on this page for the latest API rates.
How does Apertus 1.5 70B perform on benchmarks? ▶
Benchmark scores for Apertus 1.5 70B are listed on this page as they are published. You can compare it head-to-head with other models on the GenAIList compare tool.
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