All tasks / Comparisons

GLM-5.3 vs GPT-6 Astra

Compared only on public benchmark results, across the 6 tasks where both are listed: GPT-6 Astra is a tier higher in 3 of 6 shared tasks, they share a tier in 3.

GLM-5.3

Z.ai's open-weights GLM model line for reasoning, coding and agentic tasks.

Vendor: Z.ai
Weights: Open: run it yourself
Released: 14 Aug 2026
API price: $1.4 in / $4.4 out per 1M tokens
GPU memory to run locally: ~425 GB
License: GLM-5.3 License (custom; HF tag 'glm-5.3'; LMArena lists MIT)
Last verified: 18 Oct 2026

Alternatives to GLM-5.3

GPT-6 Astra

OpenAI's most capable GPT tier, introduced with GPT-6, aimed at complex reasoning and coding.

Vendor: OpenAI
Weights: Closed: API and apps only
Released: 3 Sep 2026
API price: $10 in / $50 out per 1M tokens
License: proprietary
Last verified: 18 Oct 2026

Alternatives to GPT-6 Astra

Task by task

Task	GLM-5.3	GPT-6 Astra	Higher tier
Chat & assistants Models	A1,479 on LMArena Text Arena (overall, style control) · Local	A1,477 on LMArena Text Arena (overall, style control) · Cloud	Same tier
Writing Models	A1,453 on LMArena Text Arena: Creative Writing (style control) · Local	A1,450 on LMArena Text Arena: Creative Writing (style control) · Cloud	Same tier
Coding Models	C1,622 on LMArena WebDev / Code Arena (overall) · Local	S1,776 on LMArena WebDev / Code Arena (overall) · Cloud	GPT-6 Astra
Vector graphics & logos Models	C1,293 on Design Arena SVG · Local	B1,431 on Design Arena SVG · Cloud	GPT-6 Astra
Workflow automation Models	B62.2% on AutomationBench-AA (Artificial Analysis) · Local	A68.5% on AutomationBench-AA (Artificial Analysis) · Cloud	GPT-6 Astra
Slides & presentations Models	A1,255 on Design Arena Python-PPTX Slides · Local	A1,246 on Design Arena Python-PPTX Slides · Cloud	Same tier

A tier spans a range of scores, and small gaps on a leaderboard are often within its margin of error, so only a different tier counts as ahead. How we rank.

Same benchmark, both results

Benchmark	GLM-5.3	GPT-6 Astra	Snapshot
Artificial Analysis Intelligence Index Composite index over Artificial Analysis' own evaluation suite, higher is better	45 GLM-5.3 (Max)	53 GPT-6 Astra (Max)	18 Oct 2026
AutomationBench-AA (Artificial Analysis) Score: average share of each task's objectives completed across 657 business-workflow tasks in 40 simulated SaaS apps via REST APIs; a task with any guardrail (business-rule) violation scores zero, higher is better	62.2% GLM-5.3 (Max)	68.5% GPT-6 Astra (Max)	19 Oct 2026
Design Arena Python-PPTX Slides Elo rating from crowdsourced blind pairwise votes on PowerPoint decks that models build with python-pptx in Design Arena's agent harness, higher is better	1,255 GLM-5.3	1,246 GPT-6 Astra (xhigh)	18 Oct 2026
Design Arena SVG Elo rating from crowdsourced blind pairwise votes on SVG markup that models generate from a prompt (icons, illustrations, diagrams, artistic compositions), higher is better	1,293 GLM-5.3	1,431 GPT-6 Astra (xhigh)	19 Oct 2026
EQ-Bench Creative Writing v3 Elo score from LLM-judged pairwise comparisons of creative-writing outputs (rubric score shown alongside), higher is better	2,075 GLM-5.3	2,173 gpt-6-astra	24 Sep 2026
LMArena Text Arena (overall, style control) Arena score (Bradley-Terry rating from pairwise human votes, style-controlled default view), higher is better	1,479 glm-5.3-max	1,477 gpt-6-astra-max	15 Oct 2026
LMArena Text Arena: Creative Writing (style control) Arena score (Bradley-Terry rating from pairwise human votes, creative-writing prompts only, style-controlled view), higher is better	1,453 glm-5.3-max	1,450 gpt-6-astra-max	15 Oct 2026
LMArena WebDev / Code Arena (overall) Arena score (Bradley-Terry rating from pairwise human votes on web-app generation), higher is better	1,622 GLM-5.3 (Max)	1,776 GPT-6 Astra (Max)	18 Oct 2026
SWE-Bench Pro V2 (public set, full) Resolve rate on 642 validated long-horizon tasks from 11 copyleft repositories, re-graded on a pristine image under a locked offline protocol, higher is better	95.6% GLM-5.3 (mini-swe-agent) max	96.9% GPT-6-Astra (Codex) high	19 Oct 2026