Expired50% confidenceFactExact time
Reports indicate that the context window for GPT-5.6 in Codex may be 372,000 tokens, which has not yet been officially confirmed by OpenAI.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/6/2026
First Seen
Valid until: 10/4/2026(expired)
Sources
AI Weekly: Top Coding Model Returns, Google's New Flash Checkpoint, and the Video Generation Race
bilibili安得广厦千万间6787/3/2026
Related Claims
UnverifiedIt remains uncertain whether OpenAI will impose restrictions on the approach of calling GPT-5.5 under the Codex name in the future.81% similarUnverifiedCodex is based on GPT 5.5 and has a context window of approximately 400,000 tokens.80% similarUnverifiedThe GPT 5.6 model natively supports a 1 million context window at the API level, but Codex has still not opened the full quota to subscription users.78% similarVerifiedIn a test building an image studio application, the standard GPT-5 used approximately 23.6K tokens while GPT-5 Codex used approximately 27.8K tokens.77% similarVerifiedThe Codex desktop client supports selecting the GPT-5.5 model.77% similar
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