OpenAI · GPT-5
GPT-5.5 Instant
The everyday ChatGPT default: fast enough for routine questions, drafting, rewriting and low-consequence transformations.
Start here for ordinary work. Move up only when you can name what extra reasoning should improve.
Use it for
- Quick explanations and first drafts
- Summaries and format changes
- Ordinary back-and-forth work
Do not assume speed means research, and do not use it as the only pass on difficult analysis with real consequences.
Effort without the jargon
The work is reversible, easy to inspect and does not deserve a longer reasoning pass.
Advanced recordCost, limits, privacy and operations
The ChatGPT plan and settings matter more here than API specifications: use it for ordinary work and keep sensitive material out until your workspace rules are clear.
- API cost
- Depends on surfaceIncluded usage and fallbacks vary by ChatGPT plan; this is not a standalone per-token API listing in the cited record.
- Context window
- Not disclosedNot disclosed in the cited record
- Maximum output
- Not disclosedNot disclosed in the cited record
- Knowledge cutoff
- Not disclosedNot disclosed in the cited record
- Recorded inputs
- Product-managed; not enumerated in cited record
- Recorded output
- Product-managed; not enumerated in cited record
Data handling is a product decision
Depends on surfaceRetention and training rules belong to the product, account and workspace, not the model name alone. Check the exact surface before adding sensitive material.
Operational constraints
- ChatGPT can fall back to a smaller model after plan limits are reached.
- The model is product-managed, so an API model ID and fixed API limits are not claimed here.
Unknown means the cited official record does not disclose a safe value. It is not an estimate. Prices are provider list prices in USD where stated and can change before this record's review date.
Keep the evidence separate
OpenAI keeps GPT-5.5 Instant as the fast everyday default while GPT-5.6 powers the higher reasoning choices.
No sufficiently useful independent note has been added yet. That absence is not filled with our guess.
No Human Bit result is claimed; use this as evaluation guidance only.
Not scheduled
No Human Bit result is claimed for this model yet.