Claude Mythos Preview vs Windsurf

Which one should you pick? Here's the full breakdown.

Claude Mythos Preview

C
6.5/10

Anthropic's most capable model -- a gated research preview via Project Glasswing, cybersecurity-specialized. 73% success on expert CTF tasks, 32-step autonomous network attacks. Not generally available.

Our Pick

Windsurf

B
7.5/10

Cognition's AI code editor -- Windsurf 2.0 (launched 2026-04-15) adds Agent Command Center, Spaces, and embedded Devin cloud agents. Directly competitive with Cursor 3

Powered by Cognition hosted models + Claude / GPT / Gemini (user selects) + Devin cloud agent

CategoryClaude Mythos PreviewWindsurf
Ease of Use2.08.0
Output Quality10.07.0
Value5.08.0
Features9.07.0
Overall6.57.5

Pricing Comparison

FeatureClaude Mythos PreviewWindsurf
Free TierNoYes
Starting PriceInvite only$0

Which Should You Pick?

Pick Claude Mythos Preview if...

  • ✓Higher output quality (10 vs 7)
  • ✓More features (9 vs 7)

Partner organizations in Project Glasswing doing cybersecurity research, defensive red-teaming, threat intelligence, or large-scale vulnerability triage. If your use case is legitimate cybersecurity and you have enterprise Anthropic contact, ask about Glasswing admission.

Visit Claude Mythos Preview

Pick Windsurf if...

  • ✓Easier to use (8 vs 2)
  • ✓Better value for money (8/10)
  • ✓Has a free tier

Developers who want agent-first coding (background + inline) inside a familiar VS Code-based editor, and who value Cognition's Devin integration as a core part of the workflow. The April 2026 redesign makes Windsurf 2.0 a direct alternative to Cursor 3 for this use case.

Visit Windsurf

Our Verdict

Windsurf is the clear winner here with 7.5/10 vs 6.5/10. Claude Mythos Preview isn't bad, but Windsurf outperforms it across the board. Pick Claude Mythos Preview only if partner organizations in project glasswing doing cybersecurity research, defensive red-teaming, threat intelligence, or large-scale vulnerability triage.