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DeepSeek-V4.1-Flash-1017 vs Grok-4 Heavy

DeepSeek-V4.1-Flash-1017 leads the LLM Stats Score 51.0 to 40.7.

DeepSeek · xAI · Updated for 2026

Which is better?

DeepSeek-V4.1-Flash-1017 leads the overall LLM Stats Score 51.0 to 40.7, ranking #15 overall.

In the 1 individual benchmarks reported for both models, Grok-4 Heavy wins 1; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose DeepSeek-V4.1-Flash-1017

  • overall performance matters — it scores 51.0 and ranks #15 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you need open weights you can self-host or fine-tune

Choose Grok-4 Heavy

  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results

At a glance

The differences that matter most.

DeepSeek-V4.1-Flash-1017
DeepSeek
Grok-4 Heavy
xAI
Core performance indexes
LLM Stats Score
51.0
#15
40.7
#71
Reasoning
48.6
#18
39.0
#73
Coding
39.1
#15
17.6
#134
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
$0.30 / M
— / M
Output price
$1.20 / M
— / M
Context window
1,048,576
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
DeepSeek-V4.1-Flash-1017
Grok-4 Heavy
Math
31.8#67
41.7#8
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for DeepSeek-V4.1-Flash-1017 · 6 for Grok-4 Heavy

1 shared

DeepSeek-V4.1-Flash-1017 outperforms in 0 benchmarks, while Grok-4 Heavy is better at 1 benchmark (Humanity's Last Exam).

Grok-4 Heavy significantly outperforms across most benchmarks.

Mon Oct 19 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only DeepSeek-V4.1-Flash-1017 specifies input context (1,048,576 tokens). Only DeepSeek-V4.1-Flash-1017 specifies output context (393,216 tokens).

DeepSeek
DeepSeek-V4.1-Flash-1017
Input1,048,576 tokens
Output393,216 tokens
xAI
Grok-4 Heavy
Input- tokens
Output- tokens
Mon Oct 19 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both DeepSeek-V4.1-Flash-1017 and Grok-4 Heavy support multimodal inputs.

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

DeepSeek-V4.1-Flash-1017

Text
Images
Audio
Video

Grok-4 Heavy

Text
Images
Audio
Video

License

Usage and distribution terms

DeepSeek-V4.1-Flash-1017 is licensed under MIT, while Grok-4 Heavy uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

DeepSeek-V4.1-Flash-1017

MIT

Open weights

Grok-4 Heavy

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V4.1-Flash-1017 was released on 2026-10-17, while Grok-4 Heavy's release date is not specified.

We can confirm DeepSeek-V4.1-Flash-1017's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

DeepSeek-V4.1-Flash-1017

Oct 17, 2026

2 days ago

Grok-4 Heavy

—

Knowledge Cutoff

When training data ends

Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while DeepSeek-V4.1-Flash-1017's cutoff date is not specified.

We can confirm Grok-4 Heavy's training data extends to 2024-12-31, but cannot make a direct comparison without DeepSeek-V4.1-Flash-1017's cutoff date.

DeepSeek-V4.1-Flash-1017

—

Grok-4 Heavy

Dec 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against DeepSeek-V4.1-Flash-1017 and Grok-4 Heavy side-by-side, then vote on the output you prefer.

DeepSeek-V4.1-Flash-1017
✓ Preferred
Grok-4 Heavy
Open in Playground

FAQ

Common questions about DeepSeek-V4.1-Flash-1017 vs Grok-4 Heavy.

Which is better, DeepSeek-V4.1-Flash-1017 or Grok-4 Heavy?

DeepSeek-V4.1-Flash-1017 leads the LLM Stats Score 51.0 to 40.7. DeepSeek-V4.1-Flash-1017 is made by DeepSeek and Grok-4 Heavy is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does DeepSeek-V4.1-Flash-1017 compare to Grok-4 Heavy in benchmarks?

DeepSeek-V4.1-Flash-1017 scores BabyVision: 92.5%, Chartography: 83.0%, DeepSWE 1.1: 77.0%, NL2Repo: 68.2%, AutomationBench: 60.5%. Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%.

What are the context window sizes for DeepSeek-V4.1-Flash-1017 and Grok-4 Heavy?

DeepSeek-V4.1-Flash-1017 supports 1.0M tokens and Grok-4 Heavy supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between DeepSeek-V4.1-Flash-1017 and Grok-4 Heavy?

Key differences include LLM Stats Score (51.0 vs 40.7), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V4.1-Flash-1017 and Grok-4 Heavy?

DeepSeek-V4.1-Flash-1017 is developed by DeepSeek and Grok-4 Heavy is developed by xAI.

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