Anthropic · model release forecast
When is the next Mythos-Class Model expected to be released?
Market-implied median · middle 50%: Sep 6 to Oct 26
21% within a week73% within a monthPrediction markets currently put the the next Mythos-Class Model release around Sep 13, 2026, with a middle-50% window from Sep 6, 2026 to Oct 26, 2026. Markets imply a 21% chance of landing within a week of that date, and 73% within a month. The estimate is based on 5 active deadline contracts with $211K of traded volume. It has moved 1 day earlier over the past 1 days.
Release alerts
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One email when the the next Mythos-Class Model forecast shifts by a week or more, and one when the release is confirmed. Nothing else.
The evidence
Release probability by deadline
| Deadline | Probability bar | Probability |
|---|---|---|
| By Aug 31, 2026 | 13% | |
| By Sep 9, 2026 | 31% | |
| By Sep 15, 2026 | 54% | |
| By Sep 30, 2026 | 63% | |
| By Oct 31, 2026 | 77% |
Forecast history
How this estimate has moved
Since Aug 23, 2026 the expected release date for the next Mythos-Class Model has moved 1 day earlier, from Sep 14, 2026 to Sep 13, 2026.
Also tracked