How does GPT-5.3 Codex compare with other LLMs?

AskClash compares GPT-5.3 Codex against nearby AI models using public benchmark scores, pricing, context window, and access details.

What benchmarks are tracked for GPT-5.3 Codex?

The page shows cached public benchmark cells such as HLE, GPQA, SWE-bench, SWE-Pro, Terminal-Bench, MCP Atlas, MMMU-Pro, ARC-AGI-2, Tau2, and related model scores when available.

LLM Leaderboard · Proprietary

GPT-5.3 Codex benchmarks, pricing, and LLM comparison.

Compare GPT-5.3 Codex vs GPT, Claude, Gemini, DeepSeek, open-weight, and frontier AI models using public benchmark scores, token pricing, context window, and access details.

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Rank #11AskClash overall score: 68.6

$1.75 / $14.0Input and output token price, when published. Context: 400K.

API/OAuthBilling and access path cached for this model row.

GPT-5.3 Codex benchmark snapshot

AskClash combines public LLM benchmark cells into a weighted percentile score and penalizes missing coverage so narrow rows do not dominate better-measured models.

Overall68.6

Benchmark cells10

Context400K

CreatorOpenAI

GPT-5.3 Codex public benchmark scores

Cached benchmark values can include HLE, GPQA, SWE-bench, SWE-Pro, SWE-Atlas, Terminal-Bench, MCP Atlas, MMMU-Pro, ARC-AGI-2, Tau2, and model-specific coding or agent scores.

HLE

39.9 score

GPQA

91.5 score

MATH-500

99.0 score

IFEval

75.4 score

SWE-bench

85.0 score

SWE-Pro

56.8 score

Terminal-Bench

77.3 score

OSWorld

64.7 score

MMMU-Pro

78.5 score

Tau2

86.0 score

GPT-5.3 Codex vs other AI models

Use these comparison links to evaluate GPT-5.3 Codex against nearby LLMs by benchmark score, price, context window, and provider.

GPT-5.3 Codex vs GPT-5.5 xHigh GPT-5.3 Codex vs GPT-5.5 GPT-5.3 Codex vs Claude Opus 4.7 (Adaptive)GPT-5.3 Codex vs Gemini 3.5 Flash High GPT-5.3 Codex vs GPT-5.4 GPT-5.3 Codex vs Claude Mythos Preview GPT-5.3 Codex vs Claude Opus 4.7 GPT-5.3 Codex vs Kimi K2.6 Thinking

Related AI and tech coverage

Cached AskClash article matches that can provide release, provider, benchmark, pricing, or market context around this model.

[AINews] GPT 5.5 and OpenAI Codex Superapp

Latent Space

TAI #202: GPT-5.5 Moves Codex Into Real Work

Towards AI

GPT 5.4 is a big step for Codex

On evaluating and understanding the frontier of agents, and why I still turn to Claude.

Quoting OpenAI Codex base_instructions

Never talk about goblins, gremlins, raccoons, trolls, ogres, pigeons, or other animals or creatures unless it is absolutely and unambiguously relevant to the user's query. - Tracking the history of the now-deceased OpenAI Microsoft AGI clause - 27th April 2026

Last cached leaderboard date: May 25, 2026. This model page is generated from the AskClash LLM Leaderboard cache and linked from the live leaderboard.