Claude Fable 5 vs Claude Opus 4.8
API pricing, context window and capabilities for Claude Fable 5 and Claude Opus 4.8, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Fable 5 wins on intelligence. Claude Opus 4.8 wins on price.
Price
Claude Opus 4.8
Terminal-Bench
Tied
Intelligence
Claude Fable 5
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Fable 5 wins
- More serving providers (9 vs 8)
Claude Opus 4.8 wins
- Cheaper input ($10.00 vs $5.00 /1M)
- Cheaper output ($50.00 vs $25.00 /1M)
Cheaper overall
Claude Opus 4.8
$5.00 + $25.00 /1M
Larger context
Tied
More providers
Claude Fable 5
9 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
| Claude Fable 5 | Claude Opus 4.8 | |
|---|---|---|
| Input $/1M | $10.00via Anthropic | $5.00via Anthropic best |
| Output $/1M | $50.00via Anthropic | $25.00via Anthropic best |
| Context window | 1M | 1M |
| Max output | 128K | 128K |
| Serving providers | 9 best | 8 |
| Date | Released Jun 9, 2026 | Released May 28, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Fable 5 | Claude Opus 4.8 | |
|---|---|---|
| Intelligence | 49.6 best | 41.8 |
| Terminal-Bench | 85% | 85% |
| GPQA Diamond | 93% best | 92% |
| Output speed | 66 t/s best | 62 t/s |
| Latency (TTFT) | 129.27s | 56.16s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Fable 5
via Azure
$100
Claude Opus 4.8
via Azure
$50
Capabilities
feature support, side by side| Feature | Claude Fable 5 | Claude Opus 4.8 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Fable 5 or Claude Opus 4.8?
Claude Opus 4.8 is cheaper for input ($10.00 vs $5.00 per 1M tokens) from Anthropic. Claude Opus 4.8 is cheaper for output ($50.00 vs $25.00 per 1M tokens) from Anthropic.
What is the context window difference between Claude Fable 5 and Claude Opus 4.8?
Both Claude Fable 5 and Claude Opus 4.8 have about a 1M-token context window.
How do Claude Fable 5 and Claude Opus 4.8 compare on benchmarks?
On the tracked benchmarks, they score about the same on Terminal-Bench, and Claude Fable 5 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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