Recent frontier model releases and price changes, and what they mean for people building agents. Checked 2026-10-15.
2026-10-15 NVIDIA releases Nemotron 3.5 Super VL and Nemotron 3.5 Bolt 74B A9B New open-weight NVIDIA models to watch for cheap self-hosted agent backends. Source
Oct 2026 Anthropic releases Claude Haiku 5.5 A new small, fast Claude tier — the usual pick for high-volume agent steps. Source
Oct 2026 Claude Opus 5.5 takes #1 on the Artificial Analysis Intelligence Index, with a 20% price cut Top model got cheaper, with a larger cache-hit discount — good news for long agent loops. Source
Oct 2026 GPT-6 Sol and Luna halve cost vs GPT-5.6 Same index scores at about half the cost — check whether your agent builder lets you switch. Source
Oct 2026 Mistral releases Mistral Large 4 Artificial Analysis calls it the most intelligent model outside the US and China — an EU option for compliance-minded teams. Source
2026 GPT-6 Astra launched at $10 / $50 per 1M tokens Ties the leaders on Artificial Analysis indices at lower cost than Claude Fable 5.1. Source
2026 Gemini 3.8 Flash GA: $0.75 / $3.75 per 1M tokens until Dec 31, 2026, then $1.50 / $7.50 Launch pricing ends Jan 1 — agents running on Flash will roughly double in model cost. Source
The weekly agent builder changelog
Price changes, new features, and frontier model updates — one short email a week.