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Grok-4 Fast Non-Reasoning vs LongCat-2.5

Comparing Grok-4 Fast Non-Reasoning and LongCat-2.5 across benchmarks, pricing, and capabilities.

xAI · Meituan · Updated for 2026

Which is better?

Grok-4 Fast Non-Reasoning and LongCat-2.5 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Grok-4 Fast Non-Reasoning is roughly 1.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok-4 Fast Non-Reasoning also accepts a larger context window (2,000,000 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 Grok-4 Fast Non-Reasoning

  • cost matters — it's about 1.9x cheaper per token
  • you process long inputs — it offers a 2,000,000 token context window

Choose LongCat-2.5

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

At a glance

The differences that matter most.

Grok-4 Fast Non-Reasoning
xAI
LongCat-2.5
Meituan
Benchmark wins
—
—
Input price
$0.20 / M
$0.30 / M
Output price
$0.50 / M
$1.20 / M
Context window
2,000,000
1,048,576

Individual benchmarks

0 reported for Grok-4 Fast Non-Reasoning · 23 for LongCat-2.5

No common benchmarks found

Grok-4 Fast Non-Reasoning and LongCat-2.5don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Grok-4 Fast Non-Reasoning costs less

For input processing, Grok-4 Fast Non-Reasoning ($0.20/1M tokens) is 1.5x cheaper than LongCat-2.5 ($0.30/1M tokens).

For output processing, Grok-4 Fast Non-Reasoning ($0.50/1M tokens) is 2.4x cheaper than LongCat-2.5 ($1.20/1M tokens).

In conclusion, LongCat-2.5 is more expensive than Grok-4 Fast Non-Reasoning.*

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

Lowest available price from all providers
Mon Nov 09 2026 • llm-stats.com
xAI
Grok-4 Fast Non-Reasoning
Input tokens$0.20
Output tokens$0.50
Best providerxAI
Meituan
LongCat-2.5
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Grok-4 Fast Non-Reasoning accepts 2,000,000 input tokens compared to LongCat-2.5's 1,048,576 tokens. LongCat-2.5 can generate longer responses up to 131,072 tokens, while Grok-4 Fast Non-Reasoning is limited to 30,000 tokens.

xAI
Grok-4 Fast Non-Reasoning
Input2,000,000 tokens
Output30,000 tokens
Meituan
LongCat-2.5
Input1,048,576 tokens
Output131,072 tokens
Mon Nov 09 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Grok-4 Fast Non-Reasoning and LongCat-2.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Grok-4 Fast Non-Reasoning

Text
Images
Audio
Video

LongCat-2.5

Text
Images
Audio
Video

Release Timeline

When each model was launched

Grok-4 Fast Non-Reasoning was released on 2025-08-28, while LongCat-2.5 was released on 2026-11-01.

LongCat-2.5 is 14 months newer than Grok-4 Fast Non-Reasoning.

Grok-4 Fast Non-Reasoning

Aug 28, 2025

1.2 years ago

LongCat-2.5

Nov 1, 2026

1 weeks ago

1.2yr 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

Grok-4 Fast Non-Reasoning is available from xAI. LongCat-2.5 is available from Meituan.

Grok-4 Fast Non-Reasoning

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M

LongCat-2.5

meituan logo
Meituan
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Grok-4 Fast Non-Reasoning and LongCat-2.5 side-by-side, then vote on the output you prefer.

Grok-4 Fast Non-Reasoning
✓ Preferred
LongCat-2.5
Open in Playground

FAQ

Common questions about Grok-4 Fast Non-Reasoning vs LongCat-2.5.

Which is better, Grok-4 Fast Non-Reasoning or LongCat-2.5?

Grok-4 Fast Non-Reasoning (xAI) and LongCat-2.5 (Meituan) 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 Fast Non-Reasoning compare to LongCat-2.5 in benchmarks?

LongCat-2.5 scores MathVision: 96.5%, BrowseComp: 91.9%, CharXiv-R: 90.2%, Terminal-Bench 2.1: 88.4%, Video-MME: 85.2%.

Is Grok-4 Fast Non-Reasoning cheaper than LongCat-2.5?

Grok-4 Fast Non-Reasoning is 1.5x cheaper for input tokens. Grok-4 Fast Non-Reasoning costs $0.20/M input and $0.50/M output via xai. LongCat-2.5 costs $0.30/M input and $1.20/M output via meituan.

What are the context window sizes for Grok-4 Fast Non-Reasoning and LongCat-2.5?

Grok-4 Fast Non-Reasoning supports 2.0M tokens and LongCat-2.5 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 Fast Non-Reasoning and LongCat-2.5?

Key differences include context window (2.0M vs 1.0M), input pricing ($0.20 vs $0.30/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-4 Fast Non-Reasoning and LongCat-2.5?

Grok-4 Fast Non-Reasoning is developed by xAI and LongCat-2.5 is developed by Meituan.

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