What is the difference between OpenAI Codex Mini and GLM 5?

OpenAI Codex Mini is developed by OpenAI while GLM 5 is developed by Zhipu AI. OpenAI Codex Mini has a 200K token context window vs GLM 5's 203K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, OpenAI Codex Mini or GLM 5?

It depends on your use case. OpenAI Codex Mini and GLM 5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does OpenAI Codex Mini cost compared to GLM 5?

OpenAI Codex Mini costs $1.5/M input tokens and GLM 5 costs $0.8/M input tokens. GLM 5 is $0.70/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare OpenAI Codex Mini and GLM 5 on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and GLM 5 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

What is the difference between OpenAI Codex Mini and GLM 5?

OpenAI Codex Mini is developed by OpenAI while GLM 5 is developed by Zhipu AI. OpenAI Codex Mini has a 200K token context window vs GLM 5's 203K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, OpenAI Codex Mini or GLM 5?

It depends on your use case. OpenAI Codex Mini and GLM 5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does OpenAI Codex Mini cost compared to GLM 5?

OpenAI Codex Mini costs $1.5/M input tokens and GLM 5 costs $0.8/M input tokens. GLM 5 is $0.70/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare OpenAI Codex Mini and GLM 5 on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and GLM 5 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Feb 2026

OpenAI Codex MinivsGLM 5

GLM 5 is cheaper than OpenAI Codex Mini at $0.8/M vs $1.5/M input tokens.

OpenAI Codex Mini and GLM 5 compared across 10 shared prompts
Spec	OpenAI Codex Mini	GLM 5
Input price	$1.5/M tokens	$0.8/M tokens
Output price	$6/M tokens	$2.56/M tokens
Context window	200K tokens	203K tokens
Released	May 2025	Feb 2026
SWE-bench Verified	71.3%	77.8%

Our Verdict

GLM 5

OpenAI Codex MiniRunner-up

Not enough votes to call it. On the specs, GLM 5 has the edge: bigger model tier, newer.

Too close to call

What do OpenAI Codex Mini and GLM 5 say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

OpenAI Codex Mini

Input

$1.50

Output

$6.00

GLM 5

Input

$0.80

1.9× cheaper

Output

$2.56

2.3× cheaper

GLM 5 is cheaper on both — 1.9× input, 2.3× output

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

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Updated Feb 2026

OpenAI Codex MinivsGLM 5

GLM 5 is cheaper than OpenAI Codex Mini at $0.8/M vs $1.5/M input tokens.

OpenAI Codex Mini and GLM 5 compared across 10 shared prompts
Spec	OpenAI Codex Mini	GLM 5
Input price	$1.5/M tokens	$0.8/M tokens
Output price	$6/M tokens	$2.56/M tokens
Context window	200K tokens	203K tokens
Released	May 2025	Feb 2026
SWE-bench Verified	71.3%	77.8%