Claude Fable 5 vs Claude Opus 5: Specs & Benchmark Comparison
Claude Fable 5 and Claude Opus 5 both come from Anthropic, Claude Fable 5 was released in June 2026, and Claude Opus 5 followed a month later in July 2026.
The two models share 8 published benchmarks. They split them evenly, 4 to 4. The widest gaps are on BioMysteryBench, where Claude Opus 5 scores 90.1% against 46.1%; AutomationBench, where Claude Opus 5 scores 26.0% against 17.4%. Averaged across everything we track, Claude Fable 5 sits at 60.7% and Claude Opus 5 at 55.2%.
Claude Opus 5 is the cheaper API at $5 per million input tokens and $25 per million output tokens, roughly 2 times cheaper than Claude Fable 5 at $10 and $50. Both accept a context window of about 1M tokens. Both accept text and images as input.
| Characteristic | Claude Fable 5 | Claude Opus 5 |
|---|---|---|
| Company | Anthropic | Anthropic |
| Release Date | June 9, 2026 | July 24, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 128K | 128K |
| Input Price / 1M | $10.00 | $5.00 |
| Output Price / 1M | $50.00 | $25.00 |
| Average Score | 60.7% | 55.2% |
| Benchmarks | ||
| BioMysteryBench | 46.1% | 90.1% |
| AutomationBench | 17.4% | 26.0% |
| FrontierCode | 46.3% | 53.4% |
| HealthBench Professional | 66.0% | 59.8% |
| Legal Agent Benchmark | 13.3% | 11.7% |
| DeepSWE 1.1 | 70.0% | 68.8% |
| Humanity's Last Exam | 64.5% | 64.7% |
| FrontierCode 1.1 | 53.5% | 53.4% |
Visual Benchmark Comparison
Verdict
Claude Opus 5 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Claude Fable 5 — 0.6, Claude Opus 5 — 0.6.
Claude Opus 5 is 2.0x cheaper: input $5.00/1M vs $10.00/1M tokens.
Same context size: 1M tokens.
Claude Opus 5 is newer: released 7/24/2026 vs 6/9/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — Claude Fable 5 or Claude Opus 5?
Which model is cheaper — Claude Fable 5 or Claude Opus 5?
Which has a larger context window — Claude Fable 5 or Claude Opus 5?
The Claude Fable 5 and Claude Opus 5 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Fable 5 or Claude Opus 5 page. See also the complete list of AI model comparisons.