Model comparison
DeepSeek V4 Flash vs GLM-5.1
DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 47.8 on the Noometry Index.
Last verified . 33 shared benchmarks.
DeepSeekSummary
- They share 33 benchmarks with published results for both. DeepSeek V4 Flash scores higher in 3 categories and GLM-5.1 in 5 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 39.1.
- The biggest single-benchmark swing is ProofBench: 56% for DeepSeek V4 Flash and 22.2% for GLM-5.1.
- DeepSeek V4 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $1.40 / $4.40 for GLM-5.1.
- DeepSeek V4 Flash accepts more context: 1M tokens versus 200K.
Side by side
| DeepSeek V4 Flash | GLM-5.1 | |
|---|---|---|
| Provider | DeepSeek | Z.ai (Zhipu) |
| Noometry Index | 53.6 | 47.8 |
| Released | 2026-04-24 | 2026-04-07 |
| Weights | Open | Open |
| Context window | 1M | 200K |
| Max output | 393K | 131K |
| Input $ / M tokens | $0.15 | $1.40 |
| Output $ / M tokens | $0.60 | $4.40 |
| Results tracked | 41 | 41 |
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Category by category
Coding Too close to call
DeepSeek V4 Flash: 47.9 (#59), GLM-5.1: 48.7 (#55)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| LMArena WebDev | 1582 | 1508 |
| SciCode | 49.9% | 43.8% |
| WeirdML | 63% | 57.1% |
| LMArena Coding | 1457 | 1485 |
| ALE-Bench | 1,306 | 887.1 |
| SWE-bench Verified | — | 74.2% |
| FrontierCode | 18.8% | — |
Agentic & Tool Use Not comparable
DeepSeek V4 Flash: —, GLM-5.1: 24.9 (#113)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| APEX-Agents | — | 40.9% |
| ExploitBench | — | 18.1% |
| GBAEval | — | 0% |
| Vending-Bench 2 | — | 5,634 |
Reasoning DeepSeek V4 Flash leads
DeepSeek V4 Flash: 53.7 (#30), GLM-5.1: 39.1 (#60)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| SimpleBench | 61.1% | 55.1% |
| NYT Connections (extended) | 89.6% | 77.7% |
| CritPt | 16.6% | 4.6% |
| Chess Puzzles | 33% | 19% |
| LMArena Hard Prompts | 1444 | 1472 |
| Epoch Capabilities Index | 154.49 | 149.84 |
| ARC-AGI-2 | 61.4% | — |
| Kagi LLM Benchmark | 52.2% | — |
| ARC-AGI-1 | 89% | — |
| Thematic Generalization | — | 69.8% |
| Mystery Game Puzzles | 34% | — |
| DTBench | 90.9% | — |
| LMCA | 41.7% | — |
Math DeepSeek V4 Flash leads
DeepSeek V4 Flash: 60.3 (#37), GLM-5.1: 49.7 (#60)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 57.5% | 36.8% |
| MathArena Final-Answer Competitions | 76.5% | 67.1% |
| OTIS Mock AIME 2024-2025 | 94.4% | 93.3% |
| ProofBench | 56% | 22.2% |
| LMArena Math | 1427 | 1473 |
| FrontierMath Tier 4 | 24.4% | — |
| FrontierMath (Feb 2025 set) | — | 33.4% |
| FrontierMath Tier 4 (v1) | — | 12.5% |
Knowledge Too close to call
DeepSeek V4 Flash: 55.4 (#48), GLM-5.1: 54.9 (#50)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| GPQA Diamond | 91% | 89.9% |
| SimpleQA Verified | 33.6% | 34% |
| LMArena Expert | 1441 | 1476 |
Multilingual GLM-5.1 leads
DeepSeek V4 Flash: 53.0 (#72), GLM-5.1: 55.0 (#36)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| LMArena Non-English | 1420 | 1447 |
| LMArena Chinese | 1468 | 1515 |
| LMArena French | 1439 | 1474 |
| LMArena German | 1418 | 1465 |
| LMArena Japanese | 1406 | 1434 |
| LMArena Korean | 1384 | 1418 |
| LMArena Russian | 1428 | 1454 |
| LMArena Spanish | 1436 | 1469 |
Instruction Following GLM-5.1 leads
DeepSeek V4 Flash: 74.9 (#81), GLM-5.1: 76.3 (#42)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| LMArena Instruction Following | 1421 | 1451 |
Long Context GLM-5.1 leads
DeepSeek V4 Flash: 43.8 (#85), GLM-5.1: 44.9 (#53)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| LMArena Longer Query | 1434 | 1466 |
Writing & Preference GLM-5.1 leads
DeepSeek V4 Flash: 63.8 (#61), GLM-5.1: 66.9 (#31)
| Benchmark | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| LMArena Text | 1432 | 1461 |
| LMArena Creative Writing | 1403 | 1453 |
| EQ-Bench Creative Writing | 1559 | 1592 |
| LMArena Multi-Turn | 1449 | 1472 |
Frequently asked questions
Is DeepSeek V4 Flash better than GLM-5.1?
DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 47.8 on the Noometry Index.
Which is cheaper, DeepSeek V4 Flash or GLM-5.1?
DeepSeek V4 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; GLM-5.1 lists at $1.40 and $4.40.
Is DeepSeek V4 Flash or GLM-5.1 better for coding?
They score almost the same on coding (47.9 vs 48.7); test both on your own repository before choosing.
Which has the bigger context window?
DeepSeek V4 Flash does, with 1M tokens against 200K.
How many benchmarks do DeepSeek V4 Flash and GLM-5.1 share?
33 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and GLM-5.1 has 41.