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Grok Build 0.1 vs GPT-5.2-Codex

Detailed technical comparison between Grok Build 0.1 (xAI) 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

Grok Build 0.1: 0 WinsvsGPT-5.2-Codex: 6 Wins
Context Leader

GPT-5.2-Codex

400,000 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

Grok Build 0.1

$1.00 / MTok
xAIactive

Grok Build 0.1

Grok Build 0.1 is xAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding...

View Grok Build 0.1 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
SpecificationGrok Build 0.1GPT-5.2-Codex
ProviderxAIOpenAI
Context Window256,000 tokens400,000 tokens🏆
Agent SuitabilityN/AN/A
Time to First Token (TTFT)N/AN/A
Deployment Modelmanaged apimanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2026-05-202026-01-14

API Pricing Comparison

Input Price per Million Tokens

Grok Build 0.1

$1.00

GPT-5.2-Codex

$1.75

Output Price per Million Tokens

Grok Build 0.1

$2.00

GPT-5.2-Codex

$14.00

💡 Cost Ratio: Grok Build 0.1 is 1.8x cheaper per input token than GPT-5.2-Codex.

Want to test both models live?

Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.

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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
79.6%vs93.0%+13.4% GPT-5.2-Codex
Grok Build 0.1
GPT-5.2-Codex 🏆
HumanEvalPython coding & logic synthesis
77.8%vs99.0%+21.2% GPT-5.2-Codex
Grok Build 0.1
GPT-5.2-Codex 🏆
MATHComplex mathematical problem solving
55.0%vs81.4%+26.4% GPT-5.2-Codex
Grok Build 0.1
GPT-5.2-Codex 🏆
GPQAGraduate-level expert reasoning
40.4%vs56.4%+16.0% GPT-5.2-Codex
Grok Build 0.1
GPT-5.2-Codex 🏆
HellaSwagCommonsense reasoning and inference
82.6%vs88.6%+6.0% GPT-5.2-Codex
Grok Build 0.1
GPT-5.2-Codex 🏆
MT-BenchMulti-turn conversation flow quality
8.5%vs9.5%+0.9% GPT-5.2-Codex
Grok Build 0.1
GPT-5.2-Codex 🏆

Grok Build 0.1 Quirks & Gotchas

No developer gotchas reported.

GPT-5.2-Codex Quirks & Gotchas

No developer gotchas reported.

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