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GLM 5.3

ModelOpen sourceActive
by Z.ai (Zhipu AI) · family “glm”

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves... (description from the OpenRouter listing)

in: textout: textReasoningTool useStructured output
Epoch Capabilities Index
155.6 #22 of 268
90% CI 153.6 – 158.0
Listing ↗
Released
14 Aug 2026
Context window
1.31M tokens
Max output
944K tokens
Input $ / 1M tokens
$1.40
Output $ / 1M tokens
$4.40
Cached input $ / 1M
$0.26
Each benchmark shown separately with its own source

Benchmark results (11)

All benchmarks
BenchmarkDomainScorevs best recordedSettingRunSource
Mystery Game Puzzlesgames33.0% ±4.7
39%
max30 Aug 2026Epoch ↗
FrontierMath-Tiers-1-3-v2-Privatemath68.8% ±2.7
73%
max25 Aug 2026Epoch ↗
FrontierMath-Tier-4-v2-Privatemath29.3% ±7.2
30%
max25 Aug 2026Epoch ↗
FrontierCodecoding40.1%
75%
max—External ↗
DeepSWEcoding69.0%
93%
max—External ↗
ProofBenchmath49.0%
49%
max—External ↗
Chess Puzzlesgames21.0% ±4.1
29%
max24 Aug 2026Epoch ↗
SimpleQA Verifiedknowledge41.0% ±1.6
54%
max28 Aug 2026Eval log ↗
WeirdMLcoding75.4% ±0.0
81%
max—External ↗
OTIS Mock AIME 2024-2025math91.1% ±3.5
91%
max24 Aug 2026Epoch ↗
GPQA diamondscience90.9% ±1.6
95%
max24 Aug 2026Epoch ↗

Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.

API list price over time

Price history

$ per 1M tokens

4 recorded prices on 2 Sep 2026 (OpenRouter listing + Internet Archive snapshots); re-read on every data refresh, most recently 11h ago. Steps show when the price changed.

Events