Compare · ModelsLive · 2 picked · head to head
GLM 5.3 Flash vs GPT-5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GLM 5.3 Flash wins on 7/10 benchmarks
GLM 5.3 Flash wins 7 of 10 shared benchmarks. Leads in agentic · reasoning · math.
Category leads
agentic·GLM 5.3 Flashreasoning·GLM 5.3 Flashknowledge·GPT-5math·GLM 5.3 Flashgeneral·GPT-5
Hype vs Reality
Attention vs performance
GLM 5.3 Flash
#151 by perf·#3 by attention
GPT-5
#116 by perf·#9 by attention
Best value
GLM 5.3 Flash
87.8x better value than GPT-5
GLM 5.3 Flash
813.2 pts/$
$0.06/M
GPT-5
9.3 pts/$
$5.63/M
Vendor risk
Who is behind the model
z-ai
private · undisclosed
OpenAI
$840.0B·Tier 1
Head to head
10 benchmarks · 2 models
GLM 5.3 FlashGPT-5
APEX-Agents
GLM 5.3 Flash leads by +34.5
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
GLM 5.3 Flash
52.8
GPT-5
18.3
ARC-AGI
GLM 5.3 Flash leads by +25.3
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
GLM 5.3 Flash
91.0
GPT-5
65.7
ARC-AGI-2
GLM 5.3 Flash leads by +56.0
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
GLM 5.3 Flash
65.8
GPT-5
9.9
Chess Puzzles
GPT-5 leads by +20.1
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
GLM 5.3 Flash
16.9
GPT-5
37.0
FrontierMath-Tier-4-v2-Private
GPT-5 leads by +4.9
GLM 5.3 Flash
17.1
GPT-5
21.9
FrontierMath-Tiers-1-3-v2-Private
GLM 5.3 Flash leads by +0.4
GLM 5.3 Flash
58.7
GPT-5
58.4
GPQA diamond
GLM 5.3 Flash leads by +5.5
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
GLM 5.3 Flash
90.5
GPT-5
85.0
Mystery Game Puzzles
GPT-5 leads by +15.2
GLM 5.3 Flash
0.0
GPT-5
15.2
OTIS Mock AIME 2024-2025
GLM 5.3 Flash leads by +2.5
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
GLM 5.3 Flash
93.9
GPT-5
91.4
Proofbench
GLM 5.3 Flash leads by +3.0
GLM 5.3 Flash
21.0
GPT-5
18.0
Full benchmark table
| Benchmark | GLM 5.3 Flash | GPT-5 |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 52.8 | 18.3 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 91.0 | 65.7 |
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 65.8 | 9.9 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 16.9 | 37.0 |
FrontierMath-Tier-4-v2-Private | 17.1 | 21.9 |
FrontierMath-Tiers-1-3-v2-Private | 58.7 | 58.4 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 90.5 | 85.0 |
Mystery Game Puzzles | 0.0 | 15.2 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 93.9 | 91.4 |
Proofbench | 21.0 | 18.0 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.04 | $0.08 | 1.0M tokens (~524 books) | $0.50 | |
| $1.25 | $10.00 | 400K tokens (~200 books) | $34.38 |