OpenAI widened ChatGPT access and said GPT-5.6 reduced factual errors in internal tests.
OpenAI said it is updating GPT-5.6 Sol for Plus and Pro users, making GPT-5.6 Luna the default for Free and Go users, and adding unlimited text chats for those free tiers subject to abuse guardrails. The company said internal financial, medical and legal evaluations found responses with at least one factual error were about 62% less common with GPT-5.6 Luna and 68% less common with GPT-5.6 Sol than with GPT-5.5 Instant.
Verified 12:24 AM PDT · 2 original sources
The evidence
What the reporting establishes
What happened
OpenAI said it is updating GPT-5.6 Sol for Plus and Pro users, making GPT-5.6 Luna the default for Free and Go users, and adding unlimited text chats for those free tiers subject to abuse guardrails. The company said internal financial, medical and legal evaluations found responses with at least one factual error were about 62% less common with GPT-5.6 Luna and 68% less common with GPT-5.6 Sol than with GPT-5.5 Instant.
Pressure point
The access change is observable product policy, but the reliability numbers are company-run internal evaluations. They should not be treated as independent proof that high-stakes answers are safe, or that unlimited access has no quality, cost or abuse tradeoff.
What to watch
Whether OpenAI publishes the full evaluation design; whether free-tier limits reappear under load; whether user-facing source handling improves; and whether Work and Codex model behavior diverges from consumer ChatGPT.
Audit the story
Original sources
Company claims remain company claims. Follow the reporting and judge the evidence directly.
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