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GPT Chat Latest vs GPT-5.2-Codex

Detailed technical comparison between GPT Chat Latest (OpenAI) and GPT-5.2-Codex (OpenAI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.

⚡ Executive Summary & Verdict

Comparison Snapshot

GPT Chat Latest: 0 WinsvsGPT-5.2-Codex: 6 Wins
Context Leader

Tie

Equal Capacity
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

GPT-5.2-Codex

$1.75 / MTok
OpenAIactive

GPT Chat Latest

GPT Chat Latest points to OpenAI's stable API alias `chat-latest` that always resolves to the latest Instant chat model used in ChatGPT. As OpenAI rolls out new Instant model updates...

View GPT Chat Latest Full Specs →
OpenAIactive

GPT-5.2-Codex

GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

View GPT-5.2-Codex Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationGPT Chat LatestGPT-5.2-Codex
ProviderOpenAIOpenAI
Context Window400,000 tokens400,000 tokens
Agent SuitabilityNot yet benchmarkedNot yet benchmarked
Time to First Token (TTFT)No public TTFT dataNo public TTFT data
Deployment Modelmanaged apimanaged api
Production StabilityStable GA (est.)Stable GA (est.)
API AvailableYesYes
Released Date2026-05-052026-01-14

API Pricing Comparison

Input Price per Million Tokens

GPT Chat Latest

$5.00

GPT-5.2-Codex

$1.75

Output Price per Million Tokens

GPT Chat Latest

$30.00

GPT-5.2-Codex

$14.00

💡 Cost Ratio: GPT-5.2-Codex is 2.9x cheaper per input token than GPT Chat Latest.

Want to test both models live?

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Benchmark Performance Metrics

Standardized Scores (0–100%)

Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.

MMLUGeneral knowledge & multi-task understanding
80.8%vs93.0%+12.2% GPT-5.2-Codex
GPT Chat Latest
GPT-5.2-Codex 🏆
HumanEvalPython coding & logic synthesis
79.0%vs99.0%+20.0% GPT-5.2-Codex
GPT Chat Latest
GPT-5.2-Codex 🏆
MATHComplex mathematical problem solving
56.2%vs81.4%+25.2% GPT-5.2-Codex
GPT Chat Latest
GPT-5.2-Codex 🏆
GPQAGraduate-level expert reasoning
41.6%vs56.4%+14.8% GPT-5.2-Codex
GPT Chat Latest
GPT-5.2-Codex 🏆
HellaSwagCommonsense reasoning and inference
80.4%vs88.6%+8.2% GPT-5.2-Codex
GPT Chat Latest
GPT-5.2-Codex 🏆
MT-BenchMulti-turn conversation flow quality
8.6%vs9.5%+0.8% GPT-5.2-Codex
GPT Chat Latest
GPT-5.2-Codex 🏆

GPT Chat Latest Quirks & Gotchas

No developer gotchas reported.

GPT-5.2-Codex Quirks & Gotchas

No developer gotchas reported.

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