GPT-6 Sol leaks, screenshots and release rumors

Developer theo posts that Opus 5.5, GPT-6 Sol and GPT-6 Luna all launched on the same day.

One user notes that four new model releases, including the rumored GPT-6 Sol and Luna, landed in under 24 hours, so a single day offline means missing a lot.

A post lists releases said to arrive on the first day of fall 2026: Opus 5.5, GPT-6 Sol and Luna, Tesla Bot, and Qwen4.

Polymarket reports that OpenAI unveiled GPT-6 Sol and Luna, claiming up to 93% lower task costs than Claude Opus 5 in some coding evaluations.

A user says they tested GPT-6 Sol and Luna before release and found them a major step up from GPT-5.6 rather than incremental improvements, especially for vibe coding.

A post says Sol and Luna are stronger and 50% cheaper than 5.6, with Luna at $0.10 input and $0.50 output per 1M tokens.

A screenshot shows GPT-6 Sol at 48 on the AA intelligence index, just 1 point above 5.6 Sol, though Sol and Luna both sit on the cost-performance Pareto frontier.

Altman says Sol and Luna greatly improve on the 5.6 family in intelligence, alignment, work output, coding and computer use, at half the price per token.

A Portuguese-speaking user says one GPT-6 Sol prompt made 340 tool calls in 5 minutes and opened 20 PRs splitting the app into microservices, after which nothing worked and infra costs tripled.

A user says GPT-6 Sol and Luna amount to little more than a minor release, sharing an image as evidence in a disappointed tone.

A joke post says GPT-5.6 Terra was dropped with the arrival of GPT-6 Sol and Luna, where Sol is pitched as strong and Luna as fast and cheap.

A developer rounds up launch-day claims, pairing Opus 5.5 with GPT-6 Sol and Luna and saying Sol and Luna cost 50% less than the previous generation.