September 23, 2026
Businesses get GigaChat 3.5 Reasoning for API: Cloud.ru opens commercial access
On September 23, Cloud.ru opened commercial access to GigaChat 3.5 Reasoning for businesses. The model runs through Foundation Models Cloud.ru, which accepts OpenAI-compatible requests.
In its September 23 model card, GigaChat 3.5 Ultra Instruct scored 56,2 points on LiveCodeBench v6 and 42,6 on SWE-bench Verified. Reasoning is reported at 85,4 and 64,7 points; the company ran SWE-bench through mini-swe-agent with a 3-hour limit.
The mode is enabled with a parameter. In API v1, this requires `reasoning_effort` and GigaChat SDK version 0.2.1 or later. Reasoning consumes more tokens.
The model weights are released under the MIT license, and the self-hosting example is designed for 8 H100s.
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