Model comparison
Grok 3 vs GPT-5.4
GPT-5.4 supports multimodal input, including images and files, while Grok 3 is limited to text-only processing.
xAI
Grok 3
xAI's bet on inference compute, wired into X for fresh context.
OpenAI
GPT-5.4
OpenAI's flagship — broadest modality and ecosystem coverage.
Specs
| Metric | Grok 3 | GPT-5.4 |
|---|---|---|
| Context window | 131K tokens | 1.1M tokens↑ |
| Input $/1M tokens | $3.00 | $2.50↑ |
| Output $/1M tokens | $15.00↑ | $15.00 |
| Modalities | Text | Text · Image · File |
| Open weights | No | No |
Capability differences
| Capability | Grok 3 | GPT-5.4 |
|---|---|---|
| Prompt caching | No | Yes |
How they differ
Context handling
Grok 3
Grok 3 supports a 131,072-token context window, sufficient for moderately large tasks but requiring more fragmentation for longer content.
GPT-5.4
GPT-5.4 features a massive 1,050,000-token context window, enabling it to handle extensive datasets and interactions.
Reasoning approach
Grok 3
Grok 3 prioritizes text-based reasoning with a narrower focus on domain-specific and efficient interaction.
GPT-5.4
GPT-5.4 is geared toward broad general-purpose reasoning that incorporates multimodal problem-solving.
Cost profile
Grok 3
Grok 3 charges $3.0 per 1 million input tokens and $15.0 per 1 million output tokens, resulting in higher input costs but simplified use cases.
GPT-5.4
GPT-5.4 is priced at $2.5 per 1 million input tokens and $15.0 per 1 million output tokens, offering lower input costs for extended contexts.
Speed
Grok 3
Grok 3 is optimized for faster response times within text-based, smaller-context scenarios.
GPT-5.4
GPT-5.4 may exhibit slower speeds on complex tasks due to its heightened computational requirements for multimodal processing and larger context handling.
Coding
Grok 3
Grok 3 supports efficient coding assistance for smaller-scale, text-based code interactions.
GPT-5.4
GPT-5.4 excels in handling large codebases, debugging, and diverse programming tasks, leveraging its vast context window.
Grok 3 — what sets it apart
- +Text-only focus simplifies development for specific use cases.
- +Emphasizes rapid, real-time interaction within smaller contexts.
GPT-5.4 — what sets it apart
- +Supports multimodal inputs such as images and files.
- +Handles more extensive data with a significantly higher context window.
GPT-5.4's multimodal capabilities and expansive context support contrast with Grok 3's streamlined, text-only, and faster performance for smaller contexts.
Analysis synthesized from gpt-4o, llama-4-maverick, phi-4, etc.