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Claude Fable 5 vs GLM 4.5 Air

At a glance
AnthropicClaude Fable 5

Anthropic's Mythos-class flagship for ambitious, long-running professional work.

921M ctx$10.00/$50.00 per M#2/92
Zhipu AIGLM 4.5 Air

Lightweight GLM 4.5 variant for fast, cost-efficient inference.

131K ctx$0.13/$0.85 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
AnthropicClaude Fable 5
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI91.6
Reasoning & Knowledge
Expert-Level—Factual Recall68.3%
Math
Competition Math99.7%
Zhipu AIGLM 4.5 Air
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
Capability—
Reasoning & Knowledge
Expert-Level8.1%Factual Recall—
Math
Competition Math—
Specs
AnthropicClaude Fable 5
1M
Context
128K
Max output
Jun 2026
Released
Zhipu AIGLM 4.5 Air
131K
Context
98K
Max output
Jul 2025
Released
Capabilities
AnthropicClaude Fable 5
Vision
Audio
Reasoning
Zhipu AIGLM 4.5 Air
Vision
Audio
Reasoning
Pricing
AnthropicClaude Fable 5
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$1.00/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
Zhipu AIGLM 4.5 Air
Live pricing, shown before you run
Input$0.13/M tokens
Output$0.85/M tokens
Cache read$0.02/M tokens
Chat with Claude Fable 5Go to model
Chat with GLM 4.5 AirGo to model
Frequently Asked Questions: Claude Fable 5 vs GLM 4.5 Air▼

Which is better, Claude Fable 5 or GLM 4.5 Air?

▼

Both Claude Fable 5 and GLM 4.5 Air are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Claude Fable 5 or GLM 4.5 Air?

▼

GLM 4.5 Air has a lower blended cost. Claude Fable 5: $10.00 input / $50.00 output. GLM 4.5 Air: $0.13 input / $0.85 output.

Which has a larger context window, Claude Fable 5 or GLM 4.5 Air?

▼

Claude Fable 5 has a larger context window: Claude Fable 5 supports 1M tokens vs GLM 4.5 Air at 131K tokens.

Do both Claude Fable 5 and GLM 4.5 Air support vision?

▼

Claude Fable 5 supports vision/image input, but GLM 4.5 Air does not.

What are the key differences between Claude Fable 5 and GLM 4.5 Air?

▼

Key differences: GLM 4.5 Air is significantly cheaper; only Claude Fable 5 supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Fable 5 and GLM 4.5 Air for free on idapt.app to see which performs better for your specific needs.

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