DeepSeek-V4-Flash-0731 vs Grok 4.5
DeepSeek-V4-Flash-0731 and Grok 4.5 are closely matched at 44.7 and 45.3 on the LLM Stats Score. DeepSeek-V4-Flash-0731 is 33.3x cheaper per token.
DeepSeek · xAI · Updated for 2026
Which is better?
DeepSeek-V4-Flash-0731 and Grok 4.5 are closely matched on the overall LLM Stats Score at 44.7 and 45.3.
The models split the 2 individual benchmarks reported for both models evenly.
On price, DeepSeek-V4-Flash-0731 is roughly 33.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
DeepSeek-V4-Flash-0731 also accepts a larger context window (1,048,576 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-Flash-0731
- cost matters — it's about 33.3x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Jul 2026
- you need open weights you can self-host or fine-tune
Choose Grok 4.5
- you want predictable pricing at $2.00/M input and $6.00/M output
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for DeepSeek-V4-Flash-0731 · 15 for Grok 4.5
DeepSeek-V4-Flash-0731 outperforms in 1 benchmarks (DeepSWE), while Grok 4.5 is better at 1 benchmark (Terminal-Bench 2.1).
Both models are evenly matched across the benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V4-Flash-0731 ($0.06/1M tokens) is 33.3x cheaper than Grok 4.5 ($2.00/1M tokens).
For output processing, DeepSeek-V4-Flash-0731 ($0.18/1M tokens) is 33.3x cheaper than Grok 4.5 ($6.00/1M tokens).
In conclusion, Grok 4.5 is more expensive than DeepSeek-V4-Flash-0731.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
DeepSeek-V4-Flash-0731 accepts 1,048,576 input tokens compared to Grok 4.5's 500,000 tokens. Only DeepSeek-V4-Flash-0731 specifies output context (1,048,576 tokens).
Input capabilities
Documented input modalities across available providers
Grok 4.5 supports multimodal inputs, whereas DeepSeek-V4-Flash-0731 does not.
Grok 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-V4-Flash-0731
Grok 4.5
License
Usage and distribution terms
DeepSeek-V4-Flash-0731 is licensed under MIT, while Grok 4.5 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
DeepSeek-V4-Flash-0731 was released on 2026-07-31, while Grok 4.5 was released on 2026-07-16.
DeepSeek-V4-Flash-0731 is 1 month newer than Grok 4.5.
Jul 31, 2026
1 months ago
2w newerJul 16, 2026
1 months ago
Knowledge Cutoff
When training data ends
Grok 4.5 has a documented knowledge cutoff of 2026-02-01, while DeepSeek-V4-Flash-0731's cutoff date is not specified.
We can confirm Grok 4.5's training data extends to 2026-02-01, but cannot make a direct comparison without DeepSeek-V4-Flash-0731's cutoff date.
—
Feb 2026
Provider Availability
DeepSeek-V4-Flash-0731 is available from DeepInfra, Novita, Fireworks. Grok 4.5 is available from xAI.
DeepSeek-V4-Flash-0731
Grok 4.5
Outputs Comparison
Judge for yourself.
Run your own prompts against DeepSeek-V4-Flash-0731 and Grok 4.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about DeepSeek-V4-Flash-0731 vs Grok 4.5.