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GLM-5.1

API ID glm-5.1

GLM-5.1 is a Z.ai model, released April 2026. Standard price: $1.40 input and $4.40 output per 1M tokens.

Status
Active
Released
April 2026
Shutdown
none announced
Replacement
—

Z.ai doesn't publish shutdown dates. AIWire checks its model list daily and will flag glm-5.1 if it disappears.

Benchmarks

Scores as each source published them
or

Comparing with GLM-5, the previous model in this line. A score is compared only with the same benchmark from the same source, at the same setting where both have it. Full comparison: prices, limits, features

Arena

ArenaGLM-5.1GLM-5ChangeRankDateSource
Text
By category
  • Math 1476 rank 46 vs 1443 (+33)
  • Creative writing 1447 rank 45 vs 1448 (−1, within range)
  • Instruction following 1462 rank 48 vs 1446 (+16)
  • Hard prompts 1489 rank 50 vs 1478 (+11)
  • Long prompts 1480 rank 49 vs 1468 (+12)
  • Multi-turn 1478 rank 44 vs 1472 (+6, within range)
  • Expert 1496 rank 50 vs 1481 (+15, within range)
1465 ±41457 ±4+8
within range		53 of 415
62,175 votes		Oct 13, 2026source
Text: Coding1512 ±61498 ±7+1452 of 410
16,961 votes		Oct 13, 2026source
WebDev1508 ±71435 ±8+7356 of 142
10,746 votes		Oct 13, 2026source

Rated as glm-5.1; GLM-5 as glm-5. Ratings come from people voting between two anonymous answers; Text is style-controlled, as on arena.ai. Data: Arena (arena.ai), CC BY 4.0.

Epoch AI

BenchmarkGLM-5.1GLM-5ChangeSettingRunSource
FrontierMath Tiers 1-3
Other settings
  • 24.9% vs not run no reasoning
36.8%not runAug 29, 2026source
GPQA Diamond89.9%87.8%+2.1 ptsAug 10, 2026source
OTIS Mock AIME 2024-202593.3%80.0%+13.3 ptsAug 10, 2026source
SimpleQA Verified34.0%not runAug 27, 2026source
SWE-bench Verified74.2%72.1%+2.1 ptsMay 15, 2026source

Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.

Price history

USD per 1M tokens, standard tier
$0.00$1.00$2.00$3.00$4.00$5.00Oct 2026In $1.40Out $4.40Oct 5, 2026 to Oct 15, 2026: Input $1.40, Output $4.40
$0.00$1.00$2.00$3.00$4.00$5.00Oct 2026In $1.40Out $4.40Oct 5, 2026 to Oct 15, 2026: Input $1.40, Output $4.40

We started recording this model's prices on Oct 5, 2026. The history grows with each daily check.

Show as a table
FromTypePrice
Oct 5, 2026Input$1.40
Oct 5, 2026Output$4.40

Prices

USD per 1M tokens, every type and band, by tier
TypePrice $/1MIn effect
Standard
input$1.40
cached input$0.26
output$4.40

Changelog

Changes we detected on Z.ai's pages

No changes recorded yet.

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Last checked · Sources: Z.ai models, Z.ai pricing