DeepSeek V4 Flash vs GLM-5.3-Flash
| Spec | DeepSeek V4 Flash | GLM-5.3-Flash |
|---|---|---|
| Respan Index | 45.4 (#44) | 45.2 (#45) |
| Blended price per 1M | $0.11 | $0.043 |
| Context window | 1M | 1M |
| Input / output per 1M | $0.086 / $0.18 | $0.027 / $0.092 |
| Max output | - | 131K |
| Input | text | text, vision |
| Released | 2026-07-31 | 2026-08-26 |
Respan Index by category
Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.
| Category | DeepSeek V4 Flash | GLM-5.3-Flash |
|---|---|---|
| Coding | 29.8 DeepSeek V4 Flash | 39.9 GLM-5.3-Flash |
| Agents | 58.1 DeepSeek V4 Flash | 61.6 GLM-5.3-Flash |
| Reasoning | 46.4 DeepSeek V4 Flash | 32.8 GLM-5.3-Flash |
| Knowledge & language | 35.4 DeepSeek V4 Flash | 32.0 GLM-5.3-Flash |
| Human preference | 55.3 DeepSeek V4 Flash | 56.1 GLM-5.3-Flash |
Benchmarks both report
DeepSeek V4 Flash leads on 11 of the 19 benchmarks both report. Higher is better. Each score links to where it was published.
| Benchmark | DeepSeek V4 Flash | GLM-5.3-Flash |
|---|---|---|
| Chess Puzzles (Epoch AI) | 32% | 21% |
| LMArena Elo | 1436 | 1477 |
| LMArena WebDev (LMArena) | 1582 | 1607 |
| DeepSWE v1.1 (Datacurve) | 53.3% | 63.4% |
| FrontierMath Tier 4 v2 (Epoch AI) | 24.4% | 17.1% |
| FrontierMath Tiers 1-3 v2 (Epoch AI) | 57.5% | 55.8% |
| GPQA Diamond | 91% | 90.2% |
| LiveBench Agentic Coding (LiveBench) | 46.8% | 56.8% |
| LiveBench Coding (LiveBench) | 75% | 79% |
| LiveBench Data Analysis (LiveBench) | 79.3% | 76.4% |
| LiveBench Instruction Following (LiveBench) | 65.5% | 52.8% |
| LiveBench Language (LiveBench) | 79.2% | 77.3% |
| LiveBench Mathematics (LiveBench) | 86.8% | 81.2% |
| LiveBench Reasoning (LiveBench) | 86.6% | 77.6% |
| Mystery Game Puzzles (Epoch AI) | 34% | 8% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 94.4% | 93.9% |
| Terminal-Bench 4.0 (Vals AI) | 18.7% | 37.4% |
| NL2Repo | 54.2% | 56.3% |
| Toolathlon-Verified (HKUST) | 70.7% | 78.4% |
FAQ
Is DeepSeek V4 Flash better than GLM-5.3-Flash?
DeepSeek V4 Flash scores 45.4 on the Respan Index (#44), ahead of GLM-5.3-Flash at 45.2 (#45). DeepSeek V4 Flash leads on 11 of the 19 benchmarks both report.
Which is cheaper, DeepSeek V4 Flash or GLM-5.3-Flash?
DeepSeek V4 Flash lists at $0.086 input and $0.18 output per 1M tokens; GLM-5.3-Flash at $0.027 and $0.092. GLM-5.3-Flash is 2.5x cheaper per token at list price.
Which has the larger context window?
Both accept 1M tokens of context.