GLM 5.1

glm-5.1

GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks.

Reasoning

Higher

Speed

Medium

Price

$1.40 • $4.20

Input • Output

Cache Price

$1.40 • $1.40

Read • Write

Input

Text

Output

Text

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Specifications

Context Window

203K

Max Output Tokens

131K

Announced Date

2026-04-07

Released Date

2026-04-07

Reasoning Token Support

✓

Modalities

Text

Input and output

Image

Not supported

Audio

Not supported

Video

Not supported

Endpoints

OpenAI Compatible

Chat Completions

/v1/chat/completions

Responses

/v1/responses

Embeddings

/v1/embeddings

Image Generation

/v1/images/generations

Image Edit

/v1/images/edits

Videos

/v1/videos

Claude Compatible

Messages

/v1/messages

Gemini Compatible

Generate Content

/v1beta/models/{model}:{operator}

Performance Rankings

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Code Arena

Gemini 3.1 Pro

2,093

Claude Opus 4.6

2,001

Claude Opus 4.7

1,793

GPT-5.4

1,718

Gemini 3 Flash

1,689

Gemini 3 Pro

1,579

GPT-5.2

1,523

GLM-5.1This Model

1,508

Kimi K2.5

1,473

Claude Sonnet 4.6

1,429

Chat Arena

Qwen3.5-35B-A3B

1,715

Grok-4.20 Beta Reasoning

1,698

Nemotron 3 Super (120B A12B)

1,493

Claude Opus 4.6

1,491

GPT-5.5

1,396

108

Mercury 2

324

109

Qwen3.6-27B

275

110

GLM 5.1This Model

-179

GPQA

Claude Mythos Preview

94.6%

Gemini 3.1 Pro

94.3%

Claude Opus 4.7

94.2%

GPT-5.5

93.6%

GPT-5.2 Pro

93.2%

Qwen3.5-122B-A10B

86.6%

Gemini 2.5 Pro Preview 06-05

86.4%

GLM-5.1This Model

86.2%

Qwen3.6-35B-A3B

86.0%

GLM-4.7

85.7%

AIME 2025

Grok-4 Heavy

100.0%

GPT-5.2

100.0%

Gemini 3 Pro

100.0%

Kimi K2-Thinking-0905

100.0%

GPT-5.2 Pro

100.0%

SWE-Bench

Claude Mythos Preview

93.9%

Claude Opus 4.7

87.6%

Claude Opus 4.5

80.9%

Claude Opus 4.6

80.8%

DeepSeek-V4-Pro-Max

80.6%

ARC-AGI v2

GPT-5.5

85.0%

Gemini 3.1 Pro

77.1%

GPT-5.4

73.3%

Claude Opus 4.6

68.8%

Claude Sonnet 4.6

58.3%

Metric Definitions

LLM

Code Arena: Average score across coding arenas based on human votes.
Chat Arena: Human preference score from blind comparisons.
GPQA: Graduate-level science questions requiring expert knowledge.
AIME 2025: Recent math competition problems.
SWE-Bench: Real GitHub issues requiring code changes.
ARC-AGI v2: Abstract reasoning problems.

Image

IMAGE GEN: Human preference score for text-to-image generation.
IMAGE EDIT: Human preference score for image editing and transformation.

Video

Text to Video: Human preference score for text-to-video generation.
Image to Video: Human preference score for image-to-video generation.
Video to Video: Human preference score for video editing capabilities.

TTS

TTS: Human preference score for text-to-speech quality.

STT

STT: Human preference score for transcription accuracy.

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Subscription & Pay-as-you-go

Powerful API Access

High Cost-Effectiveness

Interactive Studio UI

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