This guide was prepared by Atlas Technica AI & Advisory to support the funds we work with today and the ones we will meet tomorrow. Vendors change plans and prices often, so confirm with the vendor(s) before you sign.

Summary since the end of spring 2026

• Claude Team - minimum seats: was “5 seats” → now: 2 seats (Anthropic dropped the floor from 5 to 2 seats; noted as of September 2026). Price per seat is unchanged at $20/user/mo annual, $25/mo monthly.
• Claude Enterprise - pricing structure: was “Listed only as “Custom / sales-led”” → now: Anthropic now publishes a self-serve Enterprise price: $20/seat/month billed annually, plus usage billed at standard API rates. Self-serve requires a 20-seat minimum; sales-assisted contracts start at 50 seats.
• ChatGPT Business - seat options: was “Single seat type at $20/$25 per user/mo” → now: OpenAI added a Premium seat tier (announced ~Aug 10, 2026) at $100/user/mo annual ($125 monthly) with roughly 5x the usage of a Standard seat. Standard seat pricing is unchanged.
• ChatGPT Business & Enterprise - latest model: was “GPT-5.5” → now: GPT-5.6 family (Sol, Terra, Luna) reached general availability July 9, 2026 and replaced GPT-5.5 as OpenAI’s flagship model across Business and Enterprise workspaces.
• ChatGPT Business & Enterprise - context window: was “Business ~32K non-reasoning / 196K reasoning; Enterprise ~128K non-reasoning / 196K reasoning” → now: Current published figures show larger windows: Business ~54K non-reasoning / 256K reasoning; Enterprise ~128K non-reasoning / 256K reasoning (reasoning-mode window increased for both tiers).
• Gemini Enterprise - billing model: was “Sales-led contract only” → now: Google launched a pay-as-you-go / consumption billing option (Aug 26, 2026) for organizations with 20+ seats, which can be combined with or used instead of seat subscriptions.
• Gemini Enterprise - usage / token pooling: was “Not published” → now: Google rolled out new metered, consumption-based billing for the agent platform in stages: Skills Registry (Jul 1, 2026), Agent Gateway (Jul 13, 2026), Semantic Governance Policy (Aug 1, 2026), and Memory Bank + Sessions (Sep 1, 2026).