What the evidence says
These facts come from the reviewed Epoch AI catalog artifact and its linked primary record. They describe the model. They do not rank it.
- Developer [1]
- OpenAI
- Released [1]
- April 23, 2026
- Domains [1]
- Multimodal · Language · Vision
- Tasks [1]
- Language modeling/generation · Question answering
- Access [1]
- API access
- Weights [1]
- Closed
Where it may fit
These are evidence-bounded screening suggestions, not performance claims or purchase recommendations.
Multimodal question answering
Consider it when one API workflow must accept language and vision inputs and return answers.
Evidence fields: domains, tasks, access [1]
General language generation
Consider it for applications that generate language through a hosted API.
Evidence fields: tasks, access [1]
Limitations
The source record does not provide price, context window, latency, safety evaluations, or a directly matched Arena score. Closed weights also rule out self-hosting from this record.
Current standing
According to the LMArena snapshot published July 12, 2026, no exact match for this catalog record appears in the style-controlled text category, so this page reports no current rating for GPT-5.5.
Head-to-head comparisons
Source-backed pair pages that put GPT-5.5 next to another documented model. None declares a winner beyond what a named source's numbers say.