GPT-5 High vs Grok-4
GPT-5 High and Grok-4 are closely matched at 34.1 and 33.9 on the LLM Stats Score. GPT-5 High is 1.7x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-5 High and Grok-4 are closely matched on the overall LLM Stats Score at 34.1 and 33.9.
The models split the 2 individual benchmarks reported for both models evenly.
On price, GPT-5 High is roughly 1.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5 High also accepts a larger context window (400,000 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 GPT-5 High
- cost matters — it's about 1.7x cheaper per token
- you process long inputs — it offers a 400,000 token context window
- you want the most recent training data — it shipped Aug 2025
Choose Grok-4
- you want predictable pricing at $3.00/M input and $15.00/M output
At a glance
The differences that matter most.
Individual benchmarks
2 reported for GPT-5 High · 7 for Grok-4
GPT-5 High outperforms in 1 benchmarks (AIME 2025), while Grok-4 is better at 1 benchmark (GPQA).
Both models are evenly matched across the benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5 High ($1.25/1M tokens) is 2.4x cheaper than Grok-4 ($3.00/1M tokens).
For output processing, GPT-5 High ($10.00/1M tokens) is 1.5x cheaper than Grok-4 ($15.00/1M tokens).
In conclusion, Grok-4 is more expensive than GPT-5 High.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5 High accepts 400,000 input tokens compared to Grok-4's 256,000 tokens. GPT-5 High can generate longer responses up to 128,000 tokens, while Grok-4 is limited to 8,000 tokens.
Input capabilities
Documented input modalities across available providers
Both GPT-5 High and Grok-4 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5 High
Grok-4
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
GPT-5 High was released on 2025-08-07, while Grok-4 was released on 2025-07-09.
GPT-5 High is 1 month newer than Grok-4.
Aug 7, 2025
1.1 years ago
4w newerJul 9, 2025
1.2 years ago
Knowledge Cutoff
When training data ends
GPT-5 High has a knowledge cutoff of 2024-09-30, while Grok-4 has a cutoff of 2024-12-31.
Grok-4 has more recent training data (up to 2024-12-31), making it potentially better informed about events through that date compared to GPT-5 High (2024-09-30).
Sep 2024
Dec 2024
3 mo newerProvider Availability
GPT-5 High is available from OpenAI. Grok-4 is available from xAI.
GPT-5 High
Grok-4
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5 High and Grok-4 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5 High vs Grok-4.