Model Comparison

Grok 4.5 vs Grok 4.3Which is better in 2026?

Grok 4.5 significantly outperforms across most benchmarks. Grok 4.3 is 1.9x cheaper per token.

Verdict: Grok 4.5 vs Grok 4.3 — which is better?

Grok 4.5 (by xAI) and Grok 4.3 (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Grok 4.5 outperforms in 1 benchmarks (GDPval-AA), while Grok 4.3 is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.

On price, Grok 4.3 is roughly 1.9x 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.

Choose Grok 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose Grok 4.3 if…

  • cost matters — it's about 1.9x cheaper per token
  • you process long inputs — it offers a 1,000,000 token context window

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok 4.5 outperforms in 1 benchmarks (GDPval-AA), while Grok 4.3 is better at 0 benchmarks.

Grok 4.5 significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok 4.3 costs less

For input processing, Grok 4.5 ($2.00/1M tokens) is 1.6x more expensive than Grok 4.3 ($1.25/1M tokens).

For output processing, Grok 4.5 ($6.00/1M tokens) is 2.4x more expensive than Grok 4.3 ($2.50/1M tokens).

In conclusion, Grok 4.5 is more expensive than Grok 4.3.*

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
Best providerxAI
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

Grok 4.3 accepts 1,000,000 input tokens compared to Grok 4.5's 500,000 tokens.

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
xAI
Grok 4.3
Input1,000,000 tokens
Output- tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4.5 supports multimodal inputs, whereas Grok 4.3 does not.

Grok 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4.5

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.

Grok 4.5

Proprietary

Closed source

Grok 4.3

Proprietary

Closed source

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-08, while Grok 4.3 was released on 2026-05-06.

Grok 4.5 is 2 months newer than Grok 4.3.

Grok 4.5

Jul 8, 2026

1 weeks ago

2mo newer
Grok 4.3

May 6, 2026

2 months ago

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

Grok 4.5 is available from xAI. Grok 4.3 is available from xAI.

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M

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

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Supports multimodal inputs
Higher GDPval-AA score (51.4% vs 36.7%)
xAI
Larger context window (1,000,000 tokens)
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok 4.5 and Grok 4.3 side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
Grok 4.3
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok 4.5
xAI
Grok 4.3

FAQ

Common questions about Grok 4.5 vs Grok 4.3.

Which is better, Grok 4.5 or Grok 4.3?

Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 is made by xAI and Grok 4.3 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok 4.5 compare to Grok 4.3 in benchmarks?

Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%. Grok 4.3 scores Finance Agent v2: 37.7%, GDPval-AA: 36.7%.

Is Grok 4.5 cheaper than Grok 4.3?

Grok 4.3 is 1.6x cheaper for input tokens. Grok 4.5 costs $2.00/M input and $6.00/M output via xai. Grok 4.3 costs $1.25/M input and $2.50/M output via xai.

What are the context window sizes for Grok 4.5 and Grok 4.3?

Grok 4.5 supports 500K 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 Grok 4.5 and Grok 4.3?

Key differences include context window (500K vs 1.0M), input pricing ($2.00 vs $1.25/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

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