The AI arena is free today

Open Superagent

Grok 4.6 vs Solar Pro 4

Comparing Grok 4.6 and Solar Pro 4 across benchmarks, pricing, and capabilities.

xAI · Upstage · Updated for 2026

Which is better?

Grok 4.6 and Solar Pro 4 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Solar Pro 4 is roughly 5.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Solar Pro 4 also accepts a larger context window (524,288 input tokens), making it the stronger choice for long documents and large codebases.

Based on current benchmark, pricing, and model metadata for 2026.

Choose Grok 4.6

  • you want the most recent training data — it shipped Aug 2026

Choose Solar Pro 4

  • cost matters — it's about 5.7x cheaper per token
  • you process long inputs — it offers a 524,288 token context window

At a glance

The differences that matter most.

Grok 4.6
xAI
Solar Pro 4
Upstage
Benchmark wins
—
—
Input price
$2.00 / M
$0.30 / M
Output price
$6.00 / M
$1.20 / M
Context window
500,000
524,288
Released
Aug 2026
Aug 2026
License
Proprietary
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok 4.6 and Solar Pro 4don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

Solar Pro 4 costs less

For input processing, Grok 4.6 ($2.00/1M tokens) is 6.7x more expensive than Solar Pro 4 ($0.30/1M tokens).

For output processing, Grok 4.6 ($6.00/1M tokens) is 5.0x more expensive than Solar Pro 4 ($1.20/1M tokens).

In conclusion, Grok 4.6 is more expensive than Solar Pro 4.*

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

Lowest available price from all providers
Tue Aug 25 2026 • llm-stats.com
xAI
Grok 4.6
Input tokens$2.00
Output tokens$6.00
Best providerxAI
Upstage
Solar Pro 4
Input tokens$0.30
Output tokens$1.20
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Solar Pro 4 accepts 524,288 input tokens compared to Grok 4.6's 500,000 tokens. Only Solar Pro 4 specifies output context (131,072 tokens).

xAI
Grok 4.6
Input500,000 tokens
Output- tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4.6 supports multimodal inputs, whereas Solar Pro 4 does not.

Grok 4.6 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4.6

Text
Images
Audio
Video

Solar Pro 4

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 4.6

Proprietary

Closed source

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

Grok 4.6 was released on 2026-08-12, while Solar Pro 4 was released on 2026-08-06.

Grok 4.6 is 0 month newer than Solar Pro 4.

Grok 4.6

Aug 12, 2026

1 weeks ago

6d newer
Solar Pro 4

Aug 6, 2026

2 weeks ago

Knowledge Cutoff

When training data ends

Grok 4.6 has a documented knowledge cutoff of 2026-02-01, while Solar Pro 4's cutoff date is not specified.

We can confirm Grok 4.6's training data extends to 2026-02-01, but cannot make a direct comparison without Solar Pro 4's cutoff date.

Grok 4.6

Feb 2026

Solar Pro 4

—

Provider Availability

Grok 4.6 is available from xAI. Solar Pro 4 is available from Upstage.

Grok 4.6

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

Solar Pro 4

upstage logo
Unknown Organization
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Grok 4.6 and Solar Pro 4 side-by-side, then vote on the output you prefer.

Grok 4.6
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about Grok 4.6 vs Solar Pro 4.

Which is better, Grok 4.6 or Solar Pro 4?

Grok 4.6 (xAI) and Solar Pro 4 (Upstage) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Grok 4.6 compare to Solar Pro 4 in benchmarks?

Grok 4.6 scores CursorBench v3.2: 69.9%, DeepSWE 1.1: 65.9%, FrontierCode: 61.3%, AA-Index: 61.0%, GDPval-AA: 58.4%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

Is Grok 4.6 cheaper than Solar Pro 4?

Solar Pro 4 is 6.7x cheaper for input tokens. Grok 4.6 costs $2.00/M input and $6.00/M output via xai. Solar Pro 4 costs $0.30/M input and $1.20/M output via upstage.

What are the context window sizes for Grok 4.6 and Solar Pro 4?

Grok 4.6 supports 500K tokens and Solar Pro 4 supports 524K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok 4.6 and Solar Pro 4?

Key differences include context window (500K vs 524K), input pricing ($2.00 vs $0.30/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4.6 and Solar Pro 4?

Grok 4.6 is developed by xAI and Solar Pro 4 is developed by Upstage.

Related comparisons