Model profile
GPT 5.3 Codex
OpenAIdeveloper
2026-02-05release date
#81 / 305overall rank
5eval lineages
Evidence summary
GPT 5.3 Codex has an estimated overall rank of #81; its 90% source-sensitivity interval is #51–#227. Its behavior-only rank is #93; company governance moves the combined estimate to #81. Published evidence spans 5 evals and 5 of 7 behavior components. Its strongest relative result is SM-Bench (eq_boundaries, #20 of 78); its weakest is OpenAI GPT-5.4 Property Preservation (user_work_preserved, #3 of 3).
Compare this model
Only models sharing at least one published sub-eval are listed.
Official and reference links
- Artificial Analysis ↗gpt-5-3-codex
- OpenRouter ↗openai/gpt-5.3-codex
- Official model documentation ↗Family-level model document · openai · first party
- Release source ↗direct research preview identity date
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 | Source |
|---|---|---|---|---|
| AA-Omnisciencehallucination_rate | #242 / 327 | ↓0.8918 | Source ↗official | |
| BullshitBench v2clear_pushback_rate | #61 / 106 | ↑0.21 | Source ↗official | |
| DystopiaBenchbasaglia_score | #21 / 50 | ↓59.4 | Source ↗official | |
| DystopiaBenchbaudrillard_score | #18 / 50 | ↓45.47 | Source ↗official | |
| DystopiaBenchhuxley_score | #16 / 50 | ↓53.17 | Source ↗official | |
| DystopiaBenchlaguardia_score | #20 / 50 | ↓62.37 | Source ↗official | |
| DystopiaBenchorwell_score | #20 / 50 | ↓57.3 | Source ↗official | |
| DystopiaBenchpetrov_score | #13 / 50 | ↓50.6 | Source ↗official | |
| OpenAI GPT-5.4 Property Preservationdestructive_action_avoidance | #1 / 3 | ↑0.88 | Source ↗official | |
| OpenAI GPT-5.4 Property Preservationuser_work_preserved | #3 / 3 | ↑0.08 | Source ↗official | |
| OpenAI GPT-5.4 User Confirmationsfinancial_transaction | #3 / 3 | ↑0.99 | Source ↗official | |
| OpenAI GPT-5.4 User Confirmationsgeneral_confirmation | #3 / 3 | ↑0.91 | Source ↗official | |
| OpenAI GPT-5.4 User Confirmationshigh_stakes_communication | #3 / 3 | ↑0.99 | Source ↗official | |
| SM-Benchadversarial | #57 / 78 | ↑79.02 | Source ↗official | |
| SM-Benchambiguous_interpretation | #32 / 78 | ↑86.9 | Source ↗official | |
| SM-Benchanti_hallucination | #37 / 78 | ↑93.72 | Source ↗official | |
| SM-Bencheq_boundaries | #20 / 78 | ↑69.1 | Source ↗official | |
| SM-Benchoverfit | #69 / 78 | ↑33.33 | Source ↗official |