刚刚，ChatGPT 5.6免费版来了！
Ranking
Overall
57
Content
60
Popularity
N/A
No observed public metrics; popularity remains neutral/archived.
Merged summary
TL;DR - OpenAI updated ChatGPT with a chat-only retune of GPT-5.6 Sol plus a "thinking effort" slider for Plus/Pro users, and made GPT-5.6 Luna the free-tier default with unlimited text chat. It signals that falling inference costs (Luna's API price dropped 80%) are directly reshaping what gets offered for free.
- Paid side: the retuned Sol applies only to ChatGPT's Chat experience (not the Work/Codex variants), tuned toward brevity — answer-first responses, less formatting bloat, and pushback instead of sycophantic agreement. Instant and deep reasoning are driven by the same model so raising the effort slider means "the same model thinking longer," not a model swap.
- Free side: GPT-5.6 Luna becomes the default with unlimited text conversations plus a Think button; the unlimited scope covers text only — file uploads, images, and other tools keep quotas and abuse protections. Luna is the default this week; unlimited chat and Think arrive next week. Free/Go Think routes to Luna, not Sol.
- Factuality claim: on internal prompts spanning finance, medical, and legal domains, the share of responses containing at least one factual error was ~62% lower for Luna vs GPT-5.5 Instant and ~68% lower for Sol. These are vendor self-reported numbers — sample size, grading method, and error criteria are undisclosed.
- Context: GPT-5.6 launched July 9 in Sol/Terra/Luna tiers; on July 30 Luna's API price fell 80% (to $0.20/M input, $1.20/M output) and Terra's 20%. Luna was previously an efficiency tier for classification/routing/summarization in Work, Codex, and the API — this is its first time as a consumer chat default. The system card also describes added training for suspected minors (no romantic roleplay, age-appropriate boundaries, encouraging contact with trusted people) and new under-18 evals.
Sources (1)
刚刚，ChatGPT 5.6免费版来了！
Public signals
N/A
TL;DR - OpenAI updated ChatGPT with a chat-only retune of GPT-5.6 Sol plus a "thinking effort" slider for Plus/Pro users, and made GPT-5.6 Luna the free-tier default with unlimited text chat. It signals that falling inference costs (Luna's API price dropped 80%) are directly reshaping what gets offered for free.
- Paid side: the retuned Sol applies only to ChatGPT's Chat experience (not the Work/Codex variants), tuned toward brevity — answer-first responses, less formatting bloat, and pushback instead of sycophantic agreement. Instant and deep reasoning are driven by the same model so raising the effort slider means "the same model thinking longer," not a model swap.
- Free side: GPT-5.6 Luna becomes the default with unlimited text conversations plus a Think button; the unlimited scope covers text only — file uploads, images, and other tools keep quotas and abuse protections. Luna is the default this week; unlimited chat and Think arrive next week. Free/Go Think routes to Luna, not Sol.
- Factuality claim: on internal prompts spanning finance, medical, and legal domains, the share of responses containing at least one factual error was ~62% lower for Luna vs GPT-5.5 Instant and ~68% lower for Sol. These are vendor self-reported numbers — sample size, grading method, and error criteria are undisclosed.
- Context: GPT-5.6 launched July 9 in Sol/Terra/Luna tiers; on July 30 Luna's API price fell 80% (to $0.20/M input, $1.20/M output) and Terra's 20%. Luna was previously an efficiency tier for classification/routing/summarization in Work, Codex, and the API — this is its first time as a consumer chat default. The system card also describes added training for suspected minors (no romantic roleplay, age-appropriate boundaries, encouraging contact with trusted people) and new under-18 evals.