GPT-5.4 nano vs Grok 4.3
GPT-5.4 nano and Grok 4.3 are closely matched at 26.6 and 22.3 on the LLM Stats Score. GPT-5.4 nano is 3.4x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-5.4 nano and Grok 4.3 are closely matched on the overall LLM Stats Score at 26.6 and 22.3.
In the 1 individual benchmarks reported for both models, GPT-5.4 nano wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, GPT-5.4 nano is roughly 3.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok 4.3 also accepts a larger context window (1,000,000 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-5.4 nano
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- cost matters — it's about 3.4x cheaper per token
Choose Grok 4.3
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped May 2026
At a glance
The differences that matter most.
Individual benchmarks
15 reported for GPT-5.4 nano · 1 for Grok 4.3
GPT-5.4 nano outperforms in 1 benchmarks (Finance Agent v2), while Grok 4.3 is better at 0 benchmarks.
GPT-5.4 nano significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.4 nano ($0.20/1M tokens) is 6.3x cheaper than Grok 4.3 ($1.25/1M tokens).
For output processing, GPT-5.4 nano ($1.25/1M tokens) is 2.0x cheaper than Grok 4.3 ($2.50/1M tokens).
In conclusion, Grok 4.3 is more expensive than GPT-5.4 nano.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok 4.3 accepts 1,000,000 input tokens compared to GPT-5.4 nano's 400,000 tokens. Only GPT-5.4 nano specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.4 nano supports multimodal inputs, whereas Grok 4.3 does not.
GPT-5.4 nano can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.4 nano
Grok 4.3
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-5.4 nano was released on 2026-03-17, while Grok 4.3 was released on 2026-05-06.
Grok 4.3 is 2 months newer than GPT-5.4 nano.
Mar 17, 2026
6 months ago
May 6, 2026
4 months ago
1mo newerKnowledge Cutoff
When training data ends
GPT-5.4 nano has a documented knowledge cutoff of 2025-08-31, while Grok 4.3's cutoff date is not specified.
We can confirm GPT-5.4 nano's training data extends to 2025-08-31, but cannot make a direct comparison without Grok 4.3's cutoff date.
Aug 2025
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Provider Availability
GPT-5.4 nano is available from OpenAI. Grok 4.3 is available from xAI.
GPT-5.4 nano
Grok 4.3
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.4 nano and Grok 4.3 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.4 nano vs Grok 4.3.