ERNIE-4.5-21B-A3B-Thinking is Baidu's upgraded lightweight MoE model, refined to boost reasoning depth and quality for top-tier performance in logical puzzles, math, science, coding, text generation, and expert-level academic benchmarks.
Model details →Baidu: ERNIE 4.5 21B A3B Thinking vs Anthropic: Claude Fable Latest
Anthropic: Claude Fable Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Claude Fable family.
Model details →Side-by-side comparison
| Capability | Baidu: ERNIE 4.5 21B A3B Thinking | Anthropic: Claude Fable Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 1M | 🏆 Anthropic: Claude Fable Latest |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.07 | $10.00 | 🏆 Baidu: ERNIE 4.5 21B A3B Thinking |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.28 | $50.00 | 🏆 Baidu: ERNIE 4.5 21B A3B Thinking |
| Tool / function calling First-class support for emitting structured tool calls. | — | Yes | 🏆 Anthropic: Claude Fable Latest |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 Anthropic: Claude Fable Latest |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Baidu: ERNIE 4.5 21B A3B Thinking better than Anthropic: Claude Fable Latest?
Anthropic: Claude Fable Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Baidu: ERNIE 4.5 21B A3B Thinking and Anthropic: Claude Fable Latest?
Input: $0.07 vs $10.00 per 1M tokens. Output: $0.28 vs $50.00 per 1M tokens.
What context windows do Baidu: ERNIE 4.5 21B A3B Thinking and Anthropic: Claude Fable Latest support?
Baidu: ERNIE 4.5 21B A3B Thinking supports up to 131K tokens. Anthropic: Claude Fable Latest supports up to 1M tokens.
Do both Baidu: ERNIE 4.5 21B A3B Thinking and Anthropic: Claude Fable Latest support tool calling?
Baidu: ERNIE 4.5 21B A3B Thinking: not advertised. Anthropic: Claude Fable Latest: yes.
Compare Baidu: ERNIE 4.5 21B A3B Thinking with other models
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