GigaChat 3.5 Ultra
Russia's largest bank-built model: 432B parameters, released July 2026.
About
Released July 6, 2026, GigaChat 3.5 Ultra is the largest model Sberbank has ever released at 432 billion parameters, and the flagship of the GigaChat family — Russia's bank-built ChatGPT alternative, live since April 2023 with over 2.5 million users in its first ten months. It is built on Sber's NeONKA architecture (supervised fine-tuning plus RLHF, developed by SberDevices and Sber AI) and tuned specifically for Russian language, slang, and cultural context. Sberbank claims 4x faster long-text generation than the previous flagship. The GigaChat 2.0 generation (Pro and Max tiers) added direct audio understanding without speech-to-text conversion, emotion detection from intonation, and 200-page document handling.
Limitations: Russian-first training means English and other languages are secondary. Availability is concentrated in the Sber ecosystem and Russian market; international developers face API access friction. Independent benchmark verification is thin — most performance claims are vendor-supplied. In July 2026 Sberbank's own CEO publicly accused Yandex's competing YandexGPT-5 of being a fine-tuned Chinese Qwen, underscoring how contested Russian-model provenance claims are.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Vendor-claimed: 4x faster long-text generation vs previous flagship; independent verification thin
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 7/10
Scored 7/10 (metrics tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 56; Trending score 70/100 from researcher assessment.