OpenAI Codex Head Announces GPT-6.1 Sol Default Context Increased to 500k

OpenAI Codex head Tibo announced that the default context length of GPT-6.1 Sol has been increased from 272k to 500k when using Codex with Work, an increase of about 80%.

He stated that there will be further increases in the future, and this adjustment helps reduce compaction and supports tasks that require retaining a large amount of context and subtlety for extended periods. After careful testing, 500k has become the new balance point for most users.

Users can still override the settings to increase or decrease the context length, with the maximum context length for GPT-6.1 Sol being 1M.

With this change, there will no longer be additional charges for long context when using subscription usage for GPT-6.1 Sol. Previously, long windows were often seen as an additional cost item, and this default increase coincides with the cancellation of fees.

This adjustment mainly targets codebase processing, long report reading, and complex tasks across multiple rounds, reducing the frequency of automatic summarization or truncation triggered by insufficient context.

In the competition for long context in large models, the expansion of the default window and the cancellation of fees represent an increase in product supply, attracting heavy users to shift towards Codex and Work environments, benefiting subscription users and alleviating the pressure on usage scenarios previously limited by long context charges.

OpenAI stated that it will continue to raise the limits, but the current 500k is the main default value tested.

Source: Public Information