Anthropic: Claude Fable Latest vs Inception: Mercury 3
Anthropic: Claude Fable Latest vs Inception: Mercury 3: Anthropic: Claude Fable Latest and Inception: Mercury 3 offer the same context window (1,000,000 tokens); Inception: Mercury 3 is cheaper on input ($0.10 per 1M tokens); Anthropic: Claude Fable Latest supports more input modalities (text, image, file). Data via OpenRouter /models, as of Oct 29, 2026.
Source: OpenRouter /models · as of
OpenRouter model catalogue feed
These are provider-catalog specifications, not a task-quality benchmark. Prices describe the source listing and may vary by provider or routing. Unknown values are shown as — when the feed did not supply that value.
Side-by-side comparison
| Metric | Anthropic: Claude Fable Latest | Inception: Mercury 3 |
|---|---|---|
| Context (tokens) | 1,000,000 | 1,000,000 |
| Input $/M | $10.00 | $0.10 |
| Output $/M | $50.00 | $0.35 |
| Input modalities | text, image, file | text |
| Output modalities | text | text |
| Model id | ~anthropic/claude-fable-latest | inception/mercury-3 |
Frequently asked questions
Which has a larger context window, Anthropic: Claude Fable Latest or Inception: Mercury 3?
Anthropic: Claude Fable Latest and Inception: Mercury 3 both support 1,000,000 tokens of context. (via OpenRouter /models, as of Oct 29, 2026.)
Which is cheaper, Anthropic: Claude Fable Latest or Inception: Mercury 3?
Inception: Mercury 3 is cheaper on input at $0.10 per 1M tokens. (via OpenRouter /models, as of Oct 29, 2026.)
What input types do Anthropic: Claude Fable Latest and Inception: Mercury 3 support?
Anthropic: Claude Fable Latest accepts text, image, file; Inception: Mercury 3 accepts text.
Model details
Open the prompt composer, then choose a model →
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