OpenAI · proprietary

GPT-5.3 Codex

GPT-5.3 Codex by OpenAI appears in 1 source with Reasoning at 56.17. Best read for LLM, Low cost, Multimodal.

CreatorOpenAI

Release date2026-02-05

Knowledge cutoffNot published

Context400K tokens

Input price$1.75/M tokens

Output price$14/M tokens

Modalitytext + vision

CountryUS

Metrics

All source-backed metrics

Open in leaderboard

LLM Stats Rank18ranking · source_rank

Reasoning56.17reasoning · index_reasoning

Coding43.42coding · index_code

Vision26.91multimodal · index_vision

Tool calling38.09tool_calling · index_tool_calling

Code Arena1,366.53 %coding · coding_arena_score

SWE-bench Pro56.8 %coding · swe_bench_pro_score

Context400,000 tokenscontext · context

Speed232.82 c/sperformance · throughput

Latency1,271.27 msperformance · latency

Input price1.75 $/Mpricing · input_price

Output price14 $/Mpricing · output_price

Evidence

Citations and source overlap

LLM StatsPublic full LLM leaderboard advanced explorer snapshot, including ranking, benchmark indexes, pricing, speed, context, license, and model metadata.Retrieved 2026-06-01

FAQ

How should I read this profile?

Treat this as a source-backed model dossier, not an EvalKit-run verification. The public values are replicated from linked sources and kept source-scoped.

Is GPT-5.3 Codex verified by EvalKit?

No. EvalKit currently shows 0 verified rows until real run evidence exists.

Why can metrics disagree?

Different sources test different tasks, dates, prompts, and aggregation methods. EvalKit keeps those differences visible instead of merging them into a fake universal score.