What is GPT-5.2-Codex?

GPT-5.2-Codex is a large language model from OpenAI, released on December 18, 2025. It accepts text and image input.

When was GPT-5.2-Codex released?

OpenAI released GPT-5.2-Codex on December 18, 2025.

How much does GPT-5.2-Codex cost?

GPT-5.2-Codex costs $1.75 per 1M input tokens and $14 per 1M output tokens through the OpenAI API. Cached input costs $0.175 per 1M tokens. Prices are from OpenAI's official pricing as of October 5, 2026.

What is GPT-5.2-Codex's context window?

GPT-5.2-Codex has a 400K-token context window and can generate up to 128K output tokens.

How does GPT-5.2-Codex score on benchmarks?

GPT-5.2-Codex has 13 cited benchmark scores, including LiveBench Agentic Coding (LiveBench) 49.4%, LiveBench Coding (LiveBench) 83.6% and LiveBench Data Analysis (LiveBench) 78.2%. Each score links to its source.

GPT-5.2-Codex

OpenAI·Degraded·Released 2025-12-18textvision

Context400k

Max output128k

Input / 1M$1.75 ↗

Output / 1M$14 ↗

Cached in$0.175

Benchmarks13

Benchmarks

Cited public sources · rank is exact-benchmark, apples-to-apples

LiveBench Agentic Coding (LiveBench)

#35/5649.4% ↗

LiveBench Coding (LiveBench)

#6/5683.6% ↗

LiveBench Data Analysis (LiveBench)

#20/5678.2% ↗

LiveBench Instruction Following (LiveBench)

#36/5666.4% ↗

LiveBench Language (LiveBench)

#47/5673.7% ↗

LiveBench Mathematics (LiveBench)

#33/5688.8% ↗

LiveBench Reasoning (LiveBench)

#47/5677.7% ↗

LMArena WebDev (LMArena)

#77/941338.9 ↗

Cybersecurity Capture The Flag Challenges

#2/267.4% ↗

OSWorld-Verified

#19/2038.2% ↗

SWE-Lancer IC Diamond

#2/276% ↗

SWE-Bench Pro

#13/2156.4% ↗

Terminal-Bench 2.0

#5/2064% ↗

Compare

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GPT-5.2-Codex FAQ

What is GPT-5.2-Codex?: GPT-5.2-Codex is a large language model from OpenAI, released on December 18, 2025. It accepts text and image input.
When was GPT-5.2-Codex released?: OpenAI released GPT-5.2-Codex on December 18, 2025.
How much does GPT-5.2-Codex cost?: GPT-5.2-Codex costs $1.75 per 1M input tokens and $14 per 1M output tokens through the OpenAI API. Cached input costs $0.175 per 1M tokens. Prices are from OpenAI's official pricing as of October 5, 2026.
What is GPT-5.2-Codex's context window?: GPT-5.2-Codex has a 400K-token context window and can generate up to 128K output tokens.
How does GPT-5.2-Codex score on benchmarks?: GPT-5.2-Codex has 13 cited benchmark scores, including LiveBench Agentic Coding (LiveBench) 49.4%, LiveBench Coding (LiveBench) 83.6% and LiveBench Data Analysis (LiveBench) 78.2%. Each score links to its source.

Access GPT-5.2-Codex and every other model through one endpoint with automatic failover: Respan gateway.