CVE Rediscovery
Anthropic internal evaluation. The proportion of public CVEs that can be independently discovered from snapshots taken before fixes.
- Category
- Other
- Unit
- Percent (%)
- Higher is better
- Comparison groups
- 1total
- Currently available model rankings · Ranked results: 5
- All models (records): Groups: 1 · Entries: 15
Rankings
Values with different source types (official, third-party, paper) or measurement conditions cannot be compared, so rankings are separated by comparison group (the same source, or sources verified to use the same conditions).
Rankings include only models currently available in Claude Code / Codex, excluding legacy models.
- View on rankings page (by metric)
- Cost balance (frontier and effort changes)
- Overall ranking (performance first)
official results (Introducing Claude Fable 5.2 and Claude Mythos 5.2)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Opus 5.5 | Max | 81.3% | $2.98Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Max: 81.3% $2.98" |
| 2 | Claude Opus 5.5 | Xhigh | 76.4% | $1.05Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Xhigh: 76.4% $1.05" |
| 3 | Claude Opus 5.5 | High | 70.0% | $0.43Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · High: 70.0% $0.43" |
| 4 | Claude Opus 5.5 | Med | 66.1% | $0.28Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Med: 66.1% $0.28" |
| 5 | Claude Opus 5.5 | Low | 59.4% | $0.11Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Low: 59.4% $0.11" |
All model rankings (records)
These rankings are recalculated by comparison group including legacy models and models unavailable in Claude Code / Codex. They differ from the rankings above because the set of models differs.
- View all model rankings (by metric)
- Cost balance (all models, records)
- Overall ranking (all models, records)
Show rankings including legacy and unavailable models (entries: 15)
official results (Introducing Claude Fable 5.2 and Claude Mythos 5.2)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Mythos 5.2 | Max | 89.6% | $9.13Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.2 · Max: 89.6% $9.13" |
| 2 | Claude Mythos 5.2 | Xhigh | 88.1% | $2.40Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.2 · Xhigh: 88.1% $2.40" |
| 3 | Claude Mythos 5.2 | High | 83.2% | $1.01Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.2 · High: 83.2% $1.01" |
| 4 | Claude Opus 5.5 | Max | 81.3% | $2.98Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Max: 81.3% $2.98" |
| 5 | Claude Mythos 5.1 | Max | 78.3% | $4.14Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Max: 78.3% $4.14" |
| 6 | Claude Mythos 5.1 | Xhigh | 77.8% | $2.81Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Xhigh: 77.8% $2.81" |
| 7 | Claude Opus 5.5 | Xhigh | 76.4% | $1.05Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Xhigh: 76.4% $1.05" |
| 8 | Claude Mythos 5.1 | High | 73.8% | $1.39Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · High: 73.8% $1.39" |
| 9 | Claude Mythos 5.2 | Med | 73.3% | $0.40Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.2 · Med: 73.3% $0.40" |
| 10 | Claude Mythos 5.2 | Low | 72.4% | $0.34Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.2 · Low: 72.4% $0.34" |
| 11 | Claude Opus 5.5 | High | 70.0% | $0.43Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · High: 70.0% $0.43" |
| 12 | Claude Mythos 5.1 | Med | 69.8% | $0.89Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Med: 69.8% $0.89" |
| 13 | Claude Opus 5.5 | Med | 66.1% | $0.28Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Med: 66.1% $0.28" |
| 14 | Claude Mythos 5.1 | Low | 65.9% | $0.59Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Mythos 5.1 · Low: 65.9% $0.59" |
| 15 | Claude Opus 5.5 | Low | 59.4% | $0.11Cost per attempt | Anthropic | Introducing Claude Fable 5.2 and Claude Mythos 5.2Retrieved 2026-11-12 · Vendor-reported value. A point in the figure "CVE Rediscovery / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)Source excerptCVE Rediscovery — Accuracy vs. cost: "Opus 5.5 · Low: 59.4% $0.11" |