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

DeepSeek-V4.1-Flash-1017 leads the LLM Stats Score 51.0 to 31.4. Grok 4 Fast is 1.9x cheaper per token.

DeepSeek · xAI · Updated for 2026

Which is better?

DeepSeek-V4.1-Flash-1017 leads the overall LLM Stats Score 51.0 to 31.4, ranking #15 overall.

In the 1 individual benchmarks reported for both models, DeepSeek-V4.1-Flash-1017 wins 1; this is a narrower head-to-head signal than the composite indexes.

On price, Grok 4 Fast 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 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 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 value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Oct 2026
  • you need open weights you can self-host or fine-tune

Choose Grok 4 Fast

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

At a glance

The differences that matter most.

DeepSeek-V4.1-Flash-1017
DeepSeek
Grok 4 Fast
xAI
Core performance indexes
LLM Stats Score
51.0
#15
31.4
#132
Reasoning
48.6
#18
30.4
#138
Coding
39.1
#15
18.0
#131
Agents
38.6
#9
2.9
#185
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$0.30 / M
$0.20 / M
Output price
$1.20 / M
$0.50 / M
Context window
1,048,576
2,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
DeepSeek-V4.1-Flash-1017
Grok 4 Fast
Math
31.8#67
27.1#105
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for DeepSeek-V4.1-Flash-1017 · 7 for Grok 4 Fast

1 shared

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

DeepSeek-V4.1-Flash-1017 significantly outperforms across most benchmarks.

Mon Oct 19 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Grok 4 Fast costs less

For input processing, DeepSeek-V4.1-Flash-1017 ($0.30/1M tokens) is 1.5x more expensive than Grok 4 Fast ($0.20/1M tokens).

For output processing, DeepSeek-V4.1-Flash-1017 ($1.20/1M tokens) is 2.4x more expensive than Grok 4 Fast ($0.50/1M tokens).

In conclusion, DeepSeek-V4.1-Flash-1017 is more expensive than Grok 4 Fast.*

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

Lowest available price from all providers
Mon Oct 19 2026 • llm-stats.com
DeepSeek
DeepSeek-V4.1-Flash-1017
Input tokens$0.30
Output tokens$1.20
Best providerDeepSeek
xAI
Grok 4 Fast
Input tokens$0.20
Output tokens$0.50
Best providerxAI
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Grok 4 Fast accepts 2,000,000 input tokens compared to DeepSeek-V4.1-Flash-1017's 1,048,576 tokens. DeepSeek-V4.1-Flash-1017 can generate longer responses up to 393,216 tokens, while Grok 4 Fast is limited to 30,000 tokens.

DeepSeek
DeepSeek-V4.1-Flash-1017
Input1,048,576 tokens
Output393,216 tokens
xAI
Grok 4 Fast
Input2,000,000 tokens
Output30,000 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 Fast 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 Fast

Text
Images
Audio
Video

License

Usage and distribution terms

DeepSeek-V4.1-Flash-1017 is licensed under MIT, while Grok 4 Fast 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 Fast

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V4.1-Flash-1017 was released on 2026-10-17, while Grok 4 Fast was released on 2025-08-28.

DeepSeek-V4.1-Flash-1017 is 14 months newer than Grok 4 Fast.

DeepSeek-V4.1-Flash-1017

Oct 17, 2026

2 days ago

1.1yr newer
Grok 4 Fast

Aug 28, 2025

1.1 years 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

DeepSeek-V4.1-Flash-1017 is available from DeepSeek. Grok 4 Fast is available from xAI.

DeepSeek-V4.1-Flash-1017

deepseek logo
DeepSeek
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M

Grok 4 Fast

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

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

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

FAQ

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

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

DeepSeek-V4.1-Flash-1017 leads the LLM Stats Score 51.0 to 31.4. DeepSeek-V4.1-Flash-1017 is made by DeepSeek and Grok 4 Fast 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 Fast 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 Fast scores SimpleQA: 95.0%, HMMT 2025: 93.3%, AIME 2025: 92.0%, GPQA: 85.7%, LiveCodeBench: 80.0%.

Is DeepSeek-V4.1-Flash-1017 cheaper than Grok 4 Fast?

Grok 4 Fast is 1.5x cheaper for input tokens. DeepSeek-V4.1-Flash-1017 costs $0.30/M input and $1.20/M output via deepseek. Grok 4 Fast costs $0.20/M input and $0.50/M output via xai.

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

DeepSeek-V4.1-Flash-1017 supports 1.0M tokens and Grok 4 Fast supports 2.0M 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 Fast?

Key differences include LLM Stats Score (51.0 vs 31.4), context window (1.0M vs 2.0M), input pricing ($0.30 vs $0.20/M), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

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

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

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