Model Comparison

GPT-5.4 vs Grok 4.3

Comparing GPT-5.4 and Grok 4.3 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.4 and Grok 4.3 don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok 4.3 costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 2.0x more expensive than Grok 4.3 ($1.25/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 6.0x more expensive than Grok 4.3 ($2.50/1M tokens).

In conclusion, GPT-5.4 is more expensive than Grok 4.3.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed May 06 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
xAI
Grok 4.3
Input tokens$1.25
Output tokens$2.50
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. Only GPT-5.4 specifies output context (128,000 tokens).

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
xAI
Grok 4.3
Input1,000,000 tokens
Output- tokens
Wed May 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.4 supports multimodal inputs, whereas Grok 4.3 does not.

GPT-5.4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.4

Text
Images
Audio
Video

Grok 4.3

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-5.4

Proprietary

Closed source

Grok 4.3

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while Grok 4.3 was released on 2026-05-06.

Grok 4.3 is 2 months newer than GPT-5.4.

GPT-5.4

Mar 5, 2026

2 months ago

Grok 4.3

May 6, 2026

0 days ago

2mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

GPT-5.4 is available from OpenAI. Grok 4.3 is available from xAI.

GPT-5.4

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Grok 4.3

xai logo
xAI
Input Price:Input: $1.25/1MOutput Price:Output: $2.50/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Supports multimodal inputs
xAI
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
xAI
Grok 4.3

FAQ

Common questions about GPT-5.4 vs Grok 4.3.

Which is better, GPT-5.4 or Grok 4.3?

GPT-5.4 (OpenAI) and Grok 4.3 (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.4 compare to Grok 4.3 in benchmarks?

GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%.

Is GPT-5.4 cheaper than Grok 4.3?

Grok 4.3 is 2.0x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. Grok 4.3 costs $1.25/M input and $2.50/M output via xai.

What are the context window sizes for GPT-5.4 and Grok 4.3?

GPT-5.4 supports 1.0M tokens and Grok 4.3 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5.4 and Grok 4.3?

Key differences include input pricing ($2.50 vs $1.25/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.4 and Grok 4.3?

GPT-5.4 is developed by OpenAI and Grok 4.3 is developed by xAI.