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Claude Fable 5.1 vs GLM-4.5V

Comparing Claude Fable 5.1 and GLM-4.5V across benchmarks, pricing, and capabilities.

Anthropic · Zhipu AI · Updated for 2026

Which is better?

Claude Fable 5.1 and GLM-4.5V trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, GLM-4.5V is roughly 20.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Fable 5.1 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Fable 5.1

  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose GLM-4.5V

  • cost matters — it's about 20.8x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Fable 5.1
Anthropic
GLM-4.5V
Zhipu AI
Benchmark wins
—
—
Input price
$10.00 / M
$0.55 / M
Output price
$50.00 / M
$2.19 / M
Context window
1,000,000
131,072

Individual benchmarks

7 reported for Claude Fable 5.1 · 0 for GLM-4.5V

No common benchmarks found

Claude Fable 5.1 and GLM-4.5Vdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

GLM-4.5V costs less

For input processing, Claude Fable 5.1 ($10.00/1M tokens) is 18.2x more expensive than GLM-4.5V ($0.55/1M tokens).

For output processing, Claude Fable 5.1 ($50.00/1M tokens) is 22.8x more expensive than GLM-4.5V ($2.19/1M tokens).

In conclusion, Claude Fable 5.1 is more expensive than GLM-4.5V.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sat Sep 05 2026 • llm-stats.com
Anthropic
Claude Fable 5.1
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Zhipu AI
GLM-4.5V
Input tokens$0.55
Output tokens$2.19
Best providerFireworks
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Fable 5.1 accepts 1,000,000 input tokens compared to GLM-4.5V's 131,072 tokens. GLM-4.5V can generate longer responses up to 131,072 tokens, while Claude Fable 5.1 is limited to 128,000 tokens.

Anthropic
Claude Fable 5.1
Input1,000,000 tokens
Output128,000 tokens
Zhipu AI
GLM-4.5V
Input131,072 tokens
Output131,072 tokens
Sat Sep 05 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Fable 5.1 and GLM-4.5V support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Fable 5.1

Text
Images
Audio
Video

GLM-4.5V

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Fable 5.1 is licensed under a proprietary license, while GLM-4.5V uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Fable 5.1

Proprietary

Closed source

GLM-4.5V

MIT

Open weights

Release Timeline

When each model was launched

Claude Fable 5.1 was released on 2026-09-01, while GLM-4.5V was released on 2025-08-11.

Claude Fable 5.1 is 13 months newer than GLM-4.5V.

Claude Fable 5.1

Sep 1, 2026

4 days ago

1.1yr newer
GLM-4.5V

Aug 11, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Fable 5.1 is available from Anthropic. GLM-4.5V is available from Fireworks, Novita.

Claude Fable 5.1

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

GLM-4.5V

fireworks logo
Fireworks
Input Price:Input: $0.55/1MOutput Price:Output: $2.19/1M
novita logo
Novita
Input Price:Input: $0.60/1MOutput Price:Output: $2.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Fable 5.1 and GLM-4.5V side-by-side, then vote on the output you prefer.

Claude Fable 5.1
✓ Preferred
GLM-4.5V
Open in Playground

FAQ

Common questions about Claude Fable 5.1 vs GLM-4.5V.

Which is better, Claude Fable 5.1 or GLM-4.5V?

Claude Fable 5.1 (Anthropic) and GLM-4.5V (Zhipu AI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Claude Fable 5.1 compare to GLM-4.5V in benchmarks?

Claude Fable 5.1 scores OSWorld 2.0: 77.9%, CursorBench v3.2: 73.4%, Humanity's Last Exam: 65.0%, GDPval-AA: 61.8%, Terminal-Bench 4.0: 55.8%.

Is Claude Fable 5.1 cheaper than GLM-4.5V?

GLM-4.5V is 18.2x cheaper for input tokens. Claude Fable 5.1 costs $10.00/M input and $50.00/M output via anthropic. GLM-4.5V costs $0.55/M input and $2.19/M output via fireworks.

What are the context window sizes for Claude Fable 5.1 and GLM-4.5V?

Claude Fable 5.1 supports 1.0M tokens and GLM-4.5V supports 131K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Fable 5.1 and GLM-4.5V?

Key differences include context window (1.0M vs 131K), input pricing ($10.00 vs $0.55/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5.1 and GLM-4.5V?

Claude Fable 5.1 is developed by Anthropic and GLM-4.5V is developed by Zhipu AI.

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