AI Radar

GPT-6 Sol

Available · Language, Multimodal, Reasoning

GPT-6 Sol is the Sol tier of OpenAI's GPT-6 family, a reasoning language model for text and image input that OpenAI describes as a lower-cost alternative to GPT-6 Astra, trained with similar methods. It was released with GPT-6 Luna on 22 September 2026 in the API, Amazon Bedrock, ChatGPT Work and Codex, but not in ChatGPT conversations. [1] [2] [3] [4] [5] Primary source

Timeline of GPT-6 Sol →

Claims and evidence

  • Released Primary source[3]September, 2026: Sep 22 [5]2026-09-22: GPT-6 Sol and Luna in Codex and ChatGPT Work [1]Change log, September 22, 2026; 11. GPT-6 Sol, GPT-6 Luna [2]Availability
  • Status AvailableListed in the API model catalog and not on the deprecations page as read on 2026-10-01; the model page points to GPT-6.1 Sol as the newer Sol model. Primary source[6]Snapshots [7]Upcoming deprecations
  • Successor of GPT-5.6 SolThe launch post prices GPT-6 Sol against GPT-5.6 Sol and refers to its predecessor; the Codex changelog calls the GPT-5.6 models the predecessors of GPT-6 Sol and GPT-6 Luna. Primary source[2]GPT-6 API pricing; Factuality (its predecessor) [5]2026-09-22: GPT-6 Sol and Luna in Codex and ChatGPT Work [1]11. GPT-6 Sol, GPT-6 Luna (respective GPT-5.6 counterparts)
  • Change · Other API prices of 2 USD input and 10 USD output per million tokens, half of the promotional GPT-5.6 Sol price of 4 USD and 20 USD.Compared with GPT-5.6 Sol Primary source[2]GPT-6 API pricing
  • Change · Training data Uses the same types of data and training as GPT-6 Astra, with a knowledge cutoff of 20 April 2026 against 16 February 2026 for GPT-5.6 Sol.Compared with GPT-5.6 Sol Primary source[1] [6]Model details [8]Model details
  • Change · Availability In ChatGPT offered only in ChatGPT Work and Codex, not in ChatGPT conversations.Compared with GPT-5.6 Sol Primary source[5]2026-09-22: GPT-6 Sol and Luna in Codex and ChatGPT Work
  • Input text, image Primary source[6]Model details [3]September, 2026: Sep 22
  • Output text Primary source[6]Model details
  • Feature Reasoning mode Primary source[6]description (reasoning.effort); Model details (reasoning token support) [3]September, 2026: Sep 22
  • Feature Function callingIn Chat Completions only with reasoning effort none; the Responses API supports it with reasoning. Primary source[6]description; Supported features
  • Feature Computer use Primary source[6]Supported tools
  • Context window 1,050,000 tokensThe docs give 922,000 maximum input tokens and 128,000 maximum output tokens. Primary source[6]Model details
  • Parameters Not disclosedNot disclosed by OpenAI. No claim madeNo source
  • Access API, consumer app, cloud partner Primary source[2]Availability [3]September, 2026: Sep 22 [5]2026-09-22: GPT-6 Sol and Luna in Codex and ChatGPT Work [4]How Bedrock availability works

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None recorded.

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