Expired65% confidenceFactTime unknown
On complex tasks (top 10%), GPT-5 Codex uses more than twice the tokens to perform deeper reasoning.
3
Sources
65%
Confidence
Medium-term (~90 days)
Relevance
5/31/2026
First Seen
Valid until: 8/29/2026(expired)
Sources
Related Entities
Related Claims
UnverifiedGPT-5.1 Pro is a heavyweight reasoning model available only on the ChatGPT website, while GPT-5.1 Codex Max focuses on long-running agentic coding tasks.80% similarUnverifiedGPT-5 Codex adopts an elastic token allocation strategy, dynamically deciding how much compute to invest based on task difficulty78% similarPartially VerifiedAll three GPT-5.6 models achieved a perfect score of 10 on the long-horizon agent fine-tuning task, while GPT-5.5 and Opus 4.7 could only score two or three points on that task.78% similarUnverifiedGPT 5.1 claims to be 2x faster than GPT 5 on simple tasks, with a 2x depth improvement on complex tasks and a 56% reduction in hallucinations.78% similarUnverifiedOpenAI officially states that GPT-5.6 Sonara consumes only one-third the tokens of GPT-5.5 when executing programming tasks of equivalent complexity.77% similar
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