Claude Opus 4 vs Claude Fable 5.2
Claude Fable 5.2: 86.5% average across five Vision Evals tasks (#2 of 67 models). Claude Opus 4 is deprecated and was not run through Roboflow's Vision Evals, so there is no head-to-head score.
Compare Claude Opus 4 vs Claude Fable 5.2 live
Run the same image across every model that supports a task and compare their outputs side-by-side.
These models don't share enough common tasks for a side-by-side demo. See the comparison table below for their capabilities.
Claude Opus 4 vs Claude Fable 5.2 Comparison Table
Evals updated November 10, 2026Pricing updated November 10, 2026
| Property | Claude Opus 4 | Claude Fable 5.2 |
|---|---|---|
| Organization | Anthropic | Anthropic |
| Category | closed | closed |
| Modality | multimodal | multimodal |
| Release Date | May 2025 | Nov 2026 |
| Context Window | 200K | 1.0M |
| Parameters | Unknown | Unknown |
| License | Proprietary | Proprietary |
| Commercial use | commercial use per vendor terms | commercial use per vendor terms |
| Pricing per 1M tokens | ||
| Input $/1M | No published price | $8.00 |
| Output $/1M | No published price | $40.00 |
| Vision Tasks | ||
| Model Features | ||
Both support 3 more features | ||
Vision Evalsground-truth scores across 5 vision tasks, pooled at low effort | ||
| Overall | Deprecated | 86.5% |
| Avg cost / sample | – | $0.031 |
| Avg speed / sample | – | 9.33s |
| By task | ||
| Object Detection (low) | – | 81.6% ±0.3, Mean of 3 runs, range 81.2 to 81.9 |
| Object Detection (high) | – | 83.3% ±0.5, Mean of 3 runs, range 82.8 to 83.7 |
| Counting (low) | – | 86.5% ±0.0, Mean of 3 runs, range 86.5 to 86.5 |
| Counting (high) | – | 92.8% ±1.4, Mean of 3 runs, range 91.9 to 94.6 |
| Identification (low) | – | 96.9% ±0.0, Mean of 3 runs, range 96.9 to 96.9 |
| Identification (high) | – | 94.8% ±1.6, Mean of 3 runs, range 93.8 to 96.9 |
| OCR (low) | – | 79.5% |
| by category |
| |
| OCR (high) | – | 84.8% |
| by category |
| |
| Reasoning (low) | – | 88.1% ±1.3, Mean of 3 runs, range 86.8 to 89.4 |
| Reasoning (high) | – | 92.0% ±1.0, Mean of 3 runs, range 91.4 to 93.4 |
Claude Opus 4 vs Claude Fable 5.2: Overview
Claude 4 Opus, released by Anthropic in May 2025, is the flagship model of the Claude 4 family, built for complex, long-horizon reasoning and advanced coding workflows. It is multimodal, supporting text (including voice), images, and tool use, and operates as a hybrid reasoning model—able to deliver quick answers in fast mode or switch to extended thinking for deeper, multi-step problem solving. With a ~200,000-token context window and a training cutoff around March 2025, it is optimized for handling large documents, long conversations, and sophisticated agentic tasks.
It is best suited for research, enterprise automation, and software development at scale. The model is classified at Anthropic’s ASL-3 safety level, denoting advanced oversight and safety features.
Claude Fable 5.2 is a proprietary multimodal model from Anthropic, released on November 9, 2026. It accepts text and images and produces text, with a one million token context window and up to 128,000 output tokens. Adaptive thinking is always enabled, with an effort setting that controls reasoning. Anthropic positions Fable for demanding reasoning and long-running technical work, including coding and analysis of visual inputs.
Fable 5.2 succeeds Fable 5.1. Anthropic reports improvements in coding, reasoning, and vision, with output generation up to 30% faster than its predecessor. Fable and Mythos 5.2 share an underlying model, with additional cybersecurity and biology safeguards applied to Fable. Model weights are not publicly released.