Z.ai, released Apr 7, 2026

GLM-5.1price, context, benchmarks and release details

Provisional: not enough results to rank yet Open weights 64% confidence, 2 of 7 expected sources in

63.3

SI Score

#43 of 142 ranked models

Input, per 1M tokens: $1.40
Output, per 1M tokens: $4.40
Context window: 200K
Max output: 131K
Released: Apr 7, 2026

How the score breaks down

Coding 74.2

Math 51.7

Preference 78.7

Reasoning 89.9

Weights: reasoning 30%, math 15%, coding 40%, preference 15%. Results use fixed 0–100 scales before averaging, and thin evidence is pulled toward 50. Method si-v3-retained-evidence-2, computed Oct 9, 2026, 05:13 UTC.

Around it on the leaderboard

41 GPT-5.6 Luna 63.4
42 Gemma 4 26B A4B IT 63.4
43 GLM-5.1 63.3
44 DeepSeek V4 Pro 63.1
45 Gemma 4 31B IT 63.0

Full leaderboard

Benchmark results

5 benchmarks, 6 results

Each row shows the best published result. Where a model was tested at several settings, such as reasoning effort, open the row to see each one. Hover or tap a value for its source.

GPQA Diamondreasoning 89.9% 89.9

FrontierMath Tiers 1–3 (v2)math 36.8% 36.8 2 settings

About FrontierMath Tiers 1–3 (v2)

OTIS Mock AIME 2024–2025math 93.3% 93.3

SWE-bench Verifiedcoding 74.2% 74.2

LMArena Textpreference 1461.4 elo 78.7

Normalization uses a fixed 0–100 scale for each unit, independent of other models. Compare evaluation conditions before reading a small gap as decisive. “Lab-reported” marks the provider's own published figure.

Details and sources

Open weights: Yes
License: mit
Input modalities: text
First seen by SuperIndex: Oct 8, 2026
Coverage: 51% of expected source weight

Reported (2)

Epoch AI BenchmarkingOct 8, 2026
LMArena / ArenaOct 8, 2026

Awaiting (5)

ARC Prize13% of weight
Humanity’s Last Exam13% of weight
Official model cards via models.dev4% of weight
LiveBench13% of weight
Terminal-Bench6% of weight

Confidence rises as pending sources publish. Some sources never cover some models, so confidence reaches 100% at 80% of expected weight.