Model comparison
DeepSeek V4 Flash vs Grok Code Fast 1
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: DeepSeek V4 Flash #61 (Estimated); Grok Code Fast 1 #180 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. DeepSeek V4 Flash and Grok Code Fast 1 share 1 comparable benchmark result. 1 of 8 categories are comparable. 21 results are unique to DeepSeek V4 Flash; 11 to Grok Code Fast 1.
Updated July 23, 2026- Shared results
- 1
- DeepSeek V4 Flash only
- 21
- Grok Code Fast 1 only
- 11
- Comparable categories
- 1 / 8
Pick DeepSeek V4 Flash if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
DeepSeek V4 Flash is clearly ahead on the BenchAlign aggregate, 58.88 to 38.64. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok Code Fast 1 is also the more expensive model on tokens at $0.20 input / $1.50 output per 1M tokens, versus $0.14 input / $0.28 output per 1M tokens for DeepSeek V4 Flash. That is roughly 5.4x on output cost alone. DeepSeek V4 Flash gives you the larger context window at 1M, compared with 256K for Grok Code Fast 1.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | DeepSeek V4 Flash | Δ | Grok Code Fast 1 |
|---|---|---|---|
| Coding | DeepSeek V4 Flash64.2 | Margin→ 6.6 | Grok Code Fast 170.8 |
| Agentic | DeepSeek V4 Flash49.1 | MarginNo overlap | Grok Code Fast 1Not measured |
| Knowledge | DeepSeek V4 Flash38.8 | MarginNo overlap | Grok Code Fast 1Not measured |
| Math | DeepSeek V4 Flash40.8 | MarginNo overlap | Grok Code Fast 1Not measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 73.7%B 70.8%Winner: DeepSeek V4 FlashΔ 2.9SWE-bench Verified: DeepSeek V4 Flash scored 73.7%; Grok Code Fast 1 scored 70.8%. DeepSeek V4 Flash wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | DeepSeek V4 Flash | Grok Code Fast 1 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | DeepSeek V4 Flash$0.14 input / $0.28 output | Grok Code Fast 1$0.2 input / $1.5 output | DeepSeek V4 Flash has the lower combined listed price. |
| Generation speedtokens per second | DeepSeek V4 FlashNot available | Grok Code Fast 1172 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | DeepSeek V4 FlashNot available | Grok Code Fast 12.81 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | DeepSeek V4 Flash1M | Grok Code Fast 1256K | DeepSeek V4 Flash lists the larger context window. |
Benchmark Deep Dive
Agentic6 benchmarks
CodingGrok Code Fast 1 wins5 benchmarks
Reasoning4 benchmarks
Knowledge12 benchmarks
| Benchmark | DeepSeek V4 Flash | Grok Code Fast 1 | Result |
|---|---|---|---|
| MMLU-ProSource | 83% | — | Not comparable |
| SimpleQASource | 23.1% | — | Not comparable |
| Chinese-SimpleQASource | 71.5% | — | Not comparable |
| GPQASource | 71.2% | — | Not comparable |
| GPQA-DSource | 71.2% | — | Not comparable |
| HLESource | 8.1% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 21.6% | Not comparable |
| AA-GPQA DiamondSource | — | 72.7% | Not comparable |
| AA-HLESource | — | 7.5% | Not comparable |
| AA-Omniscience IndexSource | — | -36.0% | Not comparable |
| AA-Omniscience AccuracySource | — | 23.8% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 78.5% | Not comparable |
Math4 benchmarks
Multimodal1 benchmarks
| Benchmark | DeepSeek V4 Flash | Grok Code Fast 1 | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1238 | — | Not comparable |
Inst. Following1 benchmarks
| Benchmark | DeepSeek V4 Flash | Grok Code Fast 1 | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 41.4% | Not comparable |
Frequently Asked Questions (2)
Which is better, DeepSeek V4 Flash or Grok Code Fast 1?
DeepSeek V4 Flash is ahead on BenchLM's BenchAlign leaderboard, 58.88 to 38.64. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 73.7% and 70.8%.
Which is better for coding, DeepSeek V4 Flash or Grok Code Fast 1?
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 64.2. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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