Anthropic: Claude Fable Latest vs OpenAI: GPT Luna Latest
Anthropic: Claude Fable Latest vs OpenAI: GPT Luna Latest: OpenAI: GPT Luna Latest has the larger context window (1,050,000 tokens); OpenAI: GPT Luna Latest is cheaper on input ($0.10 per 1M tokens); both support 3 input modalities. 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 | OpenAI: GPT Luna Latest |
|---|---|---|
| Context (tokens) | 1,000,000 | 1,050,000 |
| Input $/M | $10.00 | $0.10 |
| Output $/M | $50.00 | $0.50 |
| Input modalities | text, image, file | file, image, text |
| Output modalities | text | text |
| Model id | ~anthropic/claude-fable-latest | ~openai/gpt-luna-latest |
Frequently asked questions
Which has a larger context window, Anthropic: Claude Fable Latest or OpenAI: GPT Luna Latest?
OpenAI: GPT Luna Latest has the larger context window at 1,050,000 tokens. (via OpenRouter /models, as of Oct 29, 2026.)
Which is cheaper, Anthropic: Claude Fable Latest or OpenAI: GPT Luna Latest?
OpenAI: GPT Luna Latest 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 OpenAI: GPT Luna Latest support?
Anthropic: Claude Fable Latest accepts text, image, file; OpenAI: GPT Luna Latest accepts file, image, text.
Model details
Open the prompt composer, then choose a model →
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