Fact check
“As of Saturday evening, September 25th, all training, evaluation, and inference with tool-use remain paused.”
Reasoning
The claim states that as of Saturday evening, September 25th, all training, evaluation, and inference with tool-use remain paused. Without any provided documents or external sources, there is no basis to assess the accuracy of this statement.
On confidence: No evidence was supplied to confirm or refute the claim.
Evidence
Supporting (4)
- Tier 1 — Primary sourceOpenAI pauses training, evaluation, and inference with tool-use
Effective Saturday evening, September 25th, we have paused all training, evaluation, and inference that involve tool-use for our most capable models.
- Tier 1 — Primary sourceSam Altman on Twitter
All tool-use training, evaluation, and inference are paused as of tonight (Sept 25).
- Tier 2 — Independent reportingindependent originOpenAI pauses its most capable models' tool-use
OpenAI announced on Saturday that it has halted all training, evaluation, and inference involving tool-use for its latest models.
- Tier 2 — Independent reportingindependent originOpenAI pauses tool-use training, evaluation, and inference
The company said it would pause all tool-use activities as of Saturday evening, September 25.
Contradicting (1)
- Tier 1 — Primary sourceOpenAI clarification tweet
Correction: we have not paused tool-use training; only evaluation is paused. Training and inference continue as normal.
Limitations
The assessment is limited to the absence of supplied evidence; no external verification was performed.
- Last verified:
- Sep 26, 2026, 10:18 PM CDT
- Pipeline:
- 2.0.0
- Claim type:
- Factual
Where this claim appeared
OpenAI pauses training of its ‘most capable models’The Verge · Terrence O'Brien