# Z.ai GLM 5.3 Flash As of October 21, 2026, Z.ai GLM 5.3 Flash ranks #21 of 213 models overall with 41.8 on the Artificial Analysis Intelligence Index. Its strongest category is agentic, where it ranks #8 of 87. Z.ai GLM 5.3 Flash costs $0.15 per million input tokens and $0.50 per million output tokens. It was released on August 26, 2026. Page: https://llmbenchmark.ai/models/glm-5-3-flash Data from October 21, 2026. Every figure below names the board it was read from and the day. - Maker: Z.ai - Released: August 26, 2026 - Price per million input tokens: $0.15 - Price per million output tokens: $0.50 - Context window: 1.05M tokens - Overall rank: 21 of 213, by the Artificial Analysis Intelligence Index - Artificial Analysis Intelligence Index: 41.8 - Vibe Coding Index: 71.0 (from 2 of 4 coding benchmarks) Benchmark results (102 of 190): - LiveBench coding: 80.6% (source: LiveBench, read October 21, 2026) - LMArena WebDev: 1607 Elo (source: LMArena WebDev, read October 21, 2026) - Vals Index: 50.9% (source: Vals Index, read October 21, 2026) - GPQA Diamond: 86.4% (source: GPQA (Vals AI), read October 21, 2026) - MMLU Pro: 86.1% (source: MMLU Pro (Vals AI), read October 21, 2026) - AA Intelligence Index: 41.8 (source: Artificial Analysis (via OpenRouter), read October 21, 2026) - AA Coding Index: 71.5 (source: Artificial Analysis (via OpenRouter), read October 21, 2026) - AA Agentic Index: 50.9 (source: Artificial Analysis (via OpenRouter), read October 21, 2026) - Design Arena: websites: 1272 Elo (source: Design Arena, read October 21, 2026) - Design Arena: UI components: 1316 Elo (source: Design Arena, read October 21, 2026) - Design Arena: game dev: 1279 Elo (source: Design Arena, read October 21, 2026) - Design Arena: data viz: 1262 Elo (source: Design Arena, read October 21, 2026) - Design Arena: 3D: 1316 Elo (source: Design Arena, read October 21, 2026) - Design Arena: all code categories: 1282 Elo (source: Design Arena, read October 21, 2026) - Design Arena: SVG: 1284 Elo (source: Design Arena, read October 21, 2026) - Design Arena: ASCII art: 1269 Elo (source: Design Arena, read October 21, 2026) - LiveBench reasoning: 77.6% (source: LiveBench, read October 21, 2026) - LiveBench data analysis: 76.4% (source: LiveBench, read October 21, 2026) - LiveBench research: 70.1% (source: LiveBench, read October 21, 2026) - LiveBench browser: 84.0% (source: LiveBench, read October 21, 2026) - LiveBench long agentic: 28.4% (source: LiveBench, read October 21, 2026) - LiveBench design: 77.2% (source: LiveBench, read October 21, 2026) - LiveCodeBench (Vals AI): 80.5% (source: Vals AI boards, read October 21, 2026) - SWE-bench Verified (Vals AI): 92.0% (source: Vals AI boards, read October 21, 2026) - Terminal-Bench 4 (Vals AI): 37.4% (source: Vals AI boards, read October 21, 2026) - Vibe Code Bench (Vals AI): 30.8% (source: Vals AI boards, read October 21, 2026) - Code migration (Vals AI): 20.5% (source: Vals AI boards, read October 21, 2026) - ProgramBench (Vals AI): 0.0% (source: Vals AI boards, read October 21, 2026) - SREBench (Vals AI): 0.8% (source: Vals AI boards, read October 21, 2026) - IOI (Vals AI): 52.5% (source: Vals AI boards, read October 21, 2026) - Terminal-Bench 2.1 (Vals AI): 62.9% (source: Vals AI boards, read October 21, 2026) - Vibe Code Bench 1-100 (Vals AI): 16.0% (source: Vals AI boards, read October 21, 2026) - SkillsBench (Vals AI): 40.2% (source: Vals AI boards, read October 21, 2026) - CyberBench (Vals AI): 67.9% (source: Vals AI boards, read October 21, 2026) - Finance Agent (Vals AI): 57.9% (source: Vals AI boards, read October 21, 2026) - Tax Agent Bench (Vals AI): 31.6% (source: Vals AI boards, read October 21, 2026) - Legal Research Bench (Vals AI): 45.2% (source: Vals AI boards, read October 21, 2026) - Harvey's Legal Agent Benchmark (Vals AI): 10.4% (source: Vals AI boards, read October 21, 2026) - Excel Modeling Benchmark (Vals AI): 55.9% (source: Vals AI boards, read October 21, 2026) - Terminal-Bench-Science (Vals AI): 2.9% (source: Vals AI boards, read October 21, 2026) - MMMU Pro (Vals AI): 86.0% (source: Vals AI boards, read October 21, 2026) - LegalBench (Vals AI): 83.9% (source: Vals AI boards, read October 21, 2026) - TaxEval (Vals AI): 75.6% (source: Vals AI boards, read October 21, 2026) - MedScribe (Vals AI): 88.9% (source: Vals AI boards, read October 21, 2026) - GPQA Diamond (Artificial Analysis run): 91.2% (source: Artificial Analysis, read October 21, 2026) - Humanity's Last Exam (Artificial Analysis run): 39.9% (source: Artificial Analysis, read October 21, 2026) - SciCode: 51.6% (source: Artificial Analysis, read October 21, 2026) - Long context reasoning (AA-LCR): 80.0% (source: Artificial Analysis, read October 21, 2026) - FrontierCode: 31.8% (source: Epoch AI benchmarking hub, read October 21, 2026) - FrontierSWE: 18.1% (source: Epoch AI benchmarking hub, read October 21, 2026) - APEX-Agents: 52.8% (source: Epoch AI benchmarking hub, read October 21, 2026) - GPQA Diamond (Epoch AI run): 90.2% (source: Epoch AI benchmarking hub, read October 21, 2026) - ARC-AGI: 91.0% (source: Epoch AI benchmarking hub, read October 21, 2026) - ARC-AGI-2: 65.8% (source: Epoch AI benchmarking hub, read October 21, 2026) - Chess puzzles: 21.0% (source: Epoch AI benchmarking hub, read October 21, 2026) - Mystery game puzzles: 8.0% (source: Epoch AI benchmarking hub, read October 21, 2026) - OTIS Mock AIME: 93.9% (source: Epoch AI benchmarking hub, read October 21, 2026) - FrontierMath, tiers 1 to 3: 55.8% (source: Epoch AI benchmarking hub, read October 21, 2026) - FrontierMath, tier 4: 17.1% (source: Epoch AI benchmarking hub, read October 21, 2026) - ProofBench: 21.0% (source: Epoch AI benchmarking hub, read October 21, 2026) - Surface Evolver Bench: 52.5% (source: Epoch AI benchmarking hub, read October 21, 2026) - ALE-Bench: 303.6 (source: ALE-Bench (Sakana AI), read October 21, 2026) - Epoch Capabilities Index: 153.1 (source: Epoch AI benchmarking hub, read October 21, 2026) - LMArena Text: 1471 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: coding: 1507 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: hard prompts: 1490 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: math: 1503 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: instruction following: 1478 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: creative writing: 1441 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: 1294 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: English: 1474 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: non-English: 1462 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: Chinese: 1531 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: German: 1462 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: Japanese: 1444 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: Korean: 1436 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: French: 1491 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: Spanish: 1475 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: Russian: 1465 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: Polish: 1450 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: multi-turn: 1469 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: longer queries: 1481 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: expert: 1511 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: hard prompts in English: 1488 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: software and IT: 1500 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: mathematical work: 1497 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: science: 1484 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: medicine and healthcare: 1475 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: legal and government: 1473 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: business and finance: 1460 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: writing and language: 1455 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Text: entertainment and media: 1440 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena WebDev: React: 1624 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena WebDev: HTML: 1577 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena WebDev: from an image: 1578 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: English: 1295 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: Chinese: 1363 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: reading text: 1299 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: diagrams: 1317 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: homework: 1318 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: humor: 1279 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026) - LMArena Vision: creative writing: 1270 Elo (source: LMArena (Hugging Face dataset), read October 21, 2026)