Price changes: the confirmed moves, and the ones to budget for

A price change is not a launch. This page separates confirmed, dated price changes from ordinary launch prices, so a December increase is not buried in a launch table.

Confirmed: Gemini 4 Argon rises on 1 December 2026

Google’s official announcement gives an introductory price of $2 per million input tokens and $10 per million output tokens, rising to $4 and $20 after 30 November 2026. Source, official first: Google Blog — Gemini 4 Argon. Full article: Gemini 4 Argon.

Preview, not permanent: Mistral Large 4

Mistral Large 4 launched in public preview on 6 October 2026, with posted rates of $1.36 and $4.18 per million tokens and preview rates of $0.68 and $2.09 shown in preview documentation. Do not budget on the preview rate as a permanent price. Source, official first: Mistral AI — Large 4. Full article: Mistral Large 4.

Cheap tiers that matter

Claude Haiku 5.5: $0.10/$0.50 per million tokens up to 100,000 tokens, $0.50/$2.50 above that threshold — Anthropic official page. GPT-6 Luna: $0.10/$0.50 per million tokens, as recorded in the rollout coverage — OpenAI official announcement. These are the rates that decide whether a high-volume workflow is affordable at all.