Dumb meter / OpenAI
Is GPT-5.6 Luna dumber today?
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How smart does it feel today?
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| Day | Lobotomized | Dumb | Meh | Solid | Big brain |
|---|
GPT-5.6 Luna board
liveHow is GPT-5.6 Luna behaving for you today? Mention the task and whether it's better or worse than last week.
What GPT-5.6 Luna costs
- Input
- $0.20 /1M tokens
- Output
- $1.20 /1M tokens
- Cached input
- $0.02 /1M tokens
- Context window
- 1.05M tokens
- Released
- July 9, 2026
Batch API: 50% off input and output.
| 1,000 chat messages1,500 tokens in, 500 out each | $0.90 |
|---|---|
| Summarize a 50-page PDF30,000 tokens in, 1,000 out | $0.0072 |
| One coding-agent task60,000 tokens in, 4,000 out, no caching | $0.017 |
Checked September 28, 2026. Official pricing · Status page
Latest from OpenAI
- GPT-6 Sol and Luna releasedSep 22 · Release
- OpenAI status: elevated errors across ChatGPT and CodexSep 3 · Official incident
- GPT-6 Astra releasedSep 3 · Release
- OpenAI cuts GPT-5.6 Terra and Luna pricesJul 30 · Release
Prices re-checked September 28, 2026.