Price comparison · checked October 12, 2026

GPT-5.3 Codex vs Grok Build 0.1 pricing

For a typical support chatbot (60,000 conversations a month), Grok Build 0.1 costs $126 a month and GPT-5.3 Codex costs $410. That makes Grok Build 0.1 3.2× cheaper for this workload.

GPT-5.3 CodexGrok Build 0.1
ProviderOpenAIxAI
Input / 1M$1.75$1.00
Cached input / 1M$0.17$0.20
Output / 1M$14.00$2.00
Context window–256K
NotesCoding modelCoding model

Monthly cost by workload

WorkloadGPT-5.3 CodexGrok Build 0.1Difference
Support chatbot
60,000 req · 1,500 in / 300 out
$410$126Grok Build 0.1 3.2× cheaper
Document summaries
20,000 req · 6,000 in / 400 out
$322$136Grok Build 0.1 2.4× cheaper
Coding assistant
30,000 req · 4,000 in / 800 out
$546$168Grok Build 0.1 3.2× cheaper
RAG search
100,000 req · 2,500 in / 250 out
$788$300Grok Build 0.1 2.6× cheaper

Standard rates, no caching or batch discounts. Sources: developers.openai.com · docs.x.ai

Try your own numbers

Start from a use case

1,000 tokens is about 750 English words. Input includes your system prompt, chat history and any retrieved documents.

Grok Build 0.1
xAICheapest
$126 /mo
GPT-5.3 Codex
OpenAI
$410 /mo

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