Model Comparison
DeepSeek-V4-Flash-Max vs Grok 4.5Which is better in 2026?
Grok 4.5 significantly outperforms across most benchmarks. DeepSeek-V4-Flash-Max is 24.0x cheaper per token.
Verdict: DeepSeek-V4-Flash-Max vs Grok 4.5 — which is better?
DeepSeek-V4-Flash-Max (by DeepSeek) and Grok 4.5 (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
DeepSeek-V4-Flash-Max outperforms in 0 benchmarks, while Grok 4.5 is better at 3 benchmarks (GDPval-AA, GPQA, SWE-Bench Pro). Grok 4.5 significantly outperforms across most benchmarks.
On price, DeepSeek-V4-Flash-Max is roughly 24.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
DeepSeek-V4-Flash-Max also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Choose DeepSeek-V4-Flash-Max if…
- cost matters — it's about 24.0x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you need open weights you can self-host or fine-tune
Choose Grok 4.5 if…
- you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
- you want the most recent training data — it shipped Jul 2026
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V4-Flash-Max outperforms in 0 benchmarks, while Grok 4.5 is better at 3 benchmarks (GDPval-AA, GPQA, SWE-Bench Pro).
Grok 4.5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V4-Flash-Max ($0.10/1M tokens) is 20.0x cheaper than Grok 4.5 ($2.00/1M tokens).
For output processing, DeepSeek-V4-Flash-Max ($0.20/1M tokens) is 30.0x cheaper than Grok 4.5 ($6.00/1M tokens).
In conclusion, Grok 4.5 is more expensive than DeepSeek-V4-Flash-Max.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
DeepSeek-V4-Flash-Max accepts 1,048,576 input tokens compared to Grok 4.5's 500,000 tokens. Only DeepSeek-V4-Flash-Max specifies output context (65,536 tokens).
Input Capabilities
Supported data types and modalities
Grok 4.5 supports multimodal inputs, whereas DeepSeek-V4-Flash-Max 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-Max
Grok 4.5
License
Usage and distribution terms
DeepSeek-V4-Flash-Max 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-Max was released on 2026-04-23, while Grok 4.5 was released on 2026-07-08.
Grok 4.5 is 3 months newer than DeepSeek-V4-Flash-Max.
Apr 23, 2026
2 months ago
Jul 8, 2026
1 weeks ago
2mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
DeepSeek-V4-Flash-Max is available from DeepInfra, DeepSeek, Fireworks, Novita. Grok 4.5 is available from xAI.
DeepSeek-V4-Flash-Max
Grok 4.5
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against DeepSeek-V4-Flash-Max and Grok 4.5 side-by-side, then vote on the output you prefer.
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FAQ
Common questions about DeepSeek-V4-Flash-Max vs Grok 4.5.