Gemini 4 Argon vs GPT-5.1 Codex High
Gemini 4 Argon leads the LLM Stats Score 55.1 to 29.1. GPT-5.1 Codex High is 1.2x cheaper per token.
Google · OpenAI · Updated for 2026
Which is better?
Gemini 4 Argon leads the overall LLM Stats Score 55.1 to 29.1, ranking #4 overall.
On price, GPT-5.1 Codex High is roughly 1.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 4 Argon also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 4 Argon
- overall performance matters — it scores 55.1 and ranks #4 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Sep 2026
Choose GPT-5.1 Codex High
- cost matters — it's about 1.2x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
19 reported for Gemini 4 Argon · 1 for GPT-5.1 Codex High
Gemini 4 Argon and GPT-5.1 Codex Highdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 4 Argon ($2.00/1M tokens) is 1.6x more expensive than GPT-5.1 Codex High ($1.25/1M tokens).
For output processing, Gemini 4 Argon ($10.00/1M tokens) costs the same as GPT-5.1 Codex High ($10.00/1M tokens).
In conclusion, Gemini 4 Argon is more expensive than GPT-5.1 Codex High.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 4 Argon accepts 1,048,576 input tokens compared to GPT-5.1 Codex High's 400,000 tokens. Gemini 4 Argon can generate longer responses up to 1,048,576 tokens, while GPT-5.1 Codex High is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Gemini 4 Argon and GPT-5.1 Codex High support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 4 Argon
GPT-5.1 Codex High
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 4 Argon was released on 2026-09-30, while GPT-5.1 Codex High was released on 2025-11-12.
Gemini 4 Argon is 11 months newer than GPT-5.1 Codex High.
Sep 30, 2026
2 weeks ago
10mo newerNov 12, 2025
11 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Gemini 4 Argon is available from Google. GPT-5.1 Codex High is available from OpenAI.
Gemini 4 Argon
GPT-5.1 Codex High
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 4 Argon and GPT-5.1 Codex High side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 4 Argon vs GPT-5.1 Codex High.