Model comparison
DeepSeek-V3.2-Exp vs Grok 4 Fast
- Input
- $0.28 / 1M tokens (cache miss)
- Output
- $0.42 / 1M tokens
- Context
- 128K
- Released
- 2025-09-29
- Input
- $0.20 / 1M tokens
- Output
- $0.50 / 1M tokens
- Context
- 2M
- Released
- 2025-09
Grok 4 Fast scores higher on 5 of the 5 benchmarks both models report; Grok 4 Fast is cheaper on input tokens ($0.2 vs $0.3 per 1M, 1.4×); Grok 4 Fast has the larger context window (2M vs 128K); DeepSeek-V3.2-Exp ships open weights while Grok 4 Fast is API-only.
Specs and pricing side by side
| Spec | DeepSeek-V3.2-Exp | Grok 4 Fast |
|---|---|---|
| Maker | DeepSeek | xAI (Grok) |
| Released | 2025-09-29 | 2025-09 |
| Context window | 128K | 2M |
| Max output | 64K | not published |
| Input price | $0.28 / 1M tokens (cache miss) | $0.20 / 1M tokens |
| Output price | $0.42 / 1M tokens | $0.50 / 1M tokens |
| Parameters | 685B total (~37B active, MoE) | Undisclosed |
| License | MIT | Proprietary |
| Weights | Open weights | API only |
| Modalities | Text | Text, Vision |
| Knowledge cutoff | not published | Not publicly disclosed |
Benchmarks both models report
| Benchmark | DeepSeek-V3.2-Exp | Grok 4 Fast |
|---|---|---|
| GPQA-Diamond | 79.9% | 85.7% |
| Humanity's Last Exam | 19.8% | 20% |
| LiveCodeBench | 74.1% | 80% |
| AIME 2025 | 89.3% | 92% |
| HMMT 2025 | 83.6% | 93.3% |
Scores are as published by each maker or its cited source; harness, reasoning effort and date can differ between rows, so treat small gaps as ties. Sources are listed on each model page.
Which one should you pick?
Pick DeepSeek-V3.2-Exp if…
- You want to self-host or fine-tune (open weights, MIT).
- Your use case is: long-context document, codebase, and transcript analysis where attention cost dominates.
Pick Grok 4 Fast if…
- You care about GPQA-Diamond, Humanity's Last Exam, LiveCodeBench (it scores higher on 5 shared benchmarks).
- Cost matters: input tokens cost 1.4× less ($0.2 vs $0.3 per 1M).
- You need the longer context (2M vs 128K).
- You need Vision input, which DeepSeek-V3.2-Exp lacks.
- Your use case is: high-volume production tasks where cost per answer is the deciding factor.
FAQ
Which is better, DeepSeek-V3.2-Exp or Grok 4 Fast?
Grok 4 Fast scores higher on 5 of the 5 benchmarks both models report; Grok 4 Fast is cheaper on input tokens ($0.2 vs $0.3 per 1M, 1.4×); Grok 4 Fast has the larger context window (2M vs 128K); DeepSeek-V3.2-Exp ships open weights while Grok 4 Fast is API-only. The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.
How much cheaper is Grok 4 Fast?
DeepSeek-V3.2-Exp: $0.28 / 1M tokens (cache miss) input, $0.42 / 1M tokens output. Grok 4 Fast: $0.20 / 1M tokens input, $0.50 / 1M tokens output (list API prices as published by each maker).
What are the context windows of DeepSeek-V3.2-Exp and Grok 4 Fast?
DeepSeek-V3.2-Exp offers 128K with up to 64K output; Grok 4 Fast offers 2M.
Is DeepSeek-V3.2-Exp newer than Grok 4 Fast?
DeepSeek-V3.2-Exp was released 2025-09-29; Grok 4 Fast was released 2025-09.
Go deeper
- DeepSeek-V3.2-Exp: full specs, pricing and benchmarks
- Grok 4 Fast: full specs, pricing and benchmarks
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