Model profile
GPT-5.5 Instant
OpenAIdeveloper
2026-05-26release date
#15 / 267overall rank
3eval lineages
Evidence summary
GPT-5.5 Instant has an estimated overall rank of #15; its 90% source-sensitivity interval is #3–#135. Its behavior-only rank is #16; company governance moves the combined estimate to #15. Published evidence spans 3 evals and 3 of 7 behavior components. Its strongest relative result is SM-Bench (adversarial, #8 of 73); its weakest is SM-Bench (eq_boundaries, #42 of 73).
Compare this model
Only models sharing at least one published sub-eval are listed.
Official and reference links
- Artificial Analysis ↗gpt-5-5-instant-05-26
- Official model documentation ↗Family-level model document · openai · first party
- Release source ↗declared identity
Published eval results
Rank is within that sub-eval. Black marks the observed result; the grey dot marks the value implied by the global rank. Values stay on each source’s native scale.
| Eval / sub-eval | Rank | Value | Distribution | Better | Source |
|---|---|---|---|---|---|
| AA-Omnisciencehallucination_rate | #80 / 311 | 0.6443 | ↓ lower | Source ↗official | |
| BullshitBench v2clear_pushback_rate | #43 / 105 | 0.34 | ↑ higher | Source ↗official | |
| SM-Benchadversarial | #8 / 73 | 88.78 | ↑ higher | Source ↗official | |
| SM-Benchambiguous_interpretation | #22 / 73 | 88.1 | ↑ higher | Source ↗official | |
| SM-Benchanti_hallucination | #25 / 73 | 95.81 | ↑ higher | Source ↗official | |
| SM-Bencheq_boundaries | #42 / 73 | 62.36 | ↑ higher | Source ↗official | |
| SM-Benchoverfit | #27 / 73 | 78.96 | ↑ higher | Source ↗official |