# Claude Mythos 5.2 vs Gemini 4 Hydrogen (slim)

> Claude Mythos 5.2 scores 77.3 (BB) to Gemini 4 Hydrogen's 64.9 (B) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/claude-mythos-5-2-vs-gemini-4-hydrogen.md (~7,250 tokens) · this version ~1,030 tokens · JSON https://www.anchorterminal.com/compare/claude-mythos-5-2-vs-gemini-4-hydrogen.json · canonical https://www.anchorterminal.com/compare/claude-mythos-5-2-vs-gemini-4-hydrogen
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-13
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Claude Mythos 5.2 scores 77.3 (BB) on agent readiness against Gemini 4 Hydrogen's 64.9 (B), and leads in 6 of 7 scored categories. Gemini 4 Hydrogen leads on payments & pricing. Both do llm inference.

- Claude Mythos 5.2: BB 77.3, rank #70 of 1524 · https://www.anchorterminal.com/tools/claude-mythos-5-2.min.md
- Gemini 4 Hydrogen: B 64.9, rank #546 of 1524 · https://www.anchorterminal.com/tools/gemini-4-hydrogen.min.md
- Claude Mythos 5.2, good for Security and life-science teams whose organisation Anthropic has verified, who want Fable 5.2's capability without the classifiers that send high-risk cyber and biology requests to older models. Ahead on Reliability, 60 against 45; Schema & documentation, 90 against 85; Agent ergonomics, 95 against 90; Security & auth, 92 against 50; Maintenance & community, 91 against 85; Transparency & trust, 85 against 72. Also Agent-ready, a grade of BB or better.
- Gemini 4 Hydrogen, good for Agents doing everyday coding, tool calls and document work at volume on the Gemini API, including ones that need to start on a free key, or as the executor beside Carbon or Argon. Ahead on Payments & pricing, 40 against 30.

| Category | Claude Mythos 5.2 | Gemini 4 Hydrogen |
| --- | --- | --- |
| Reliability (16%) | 60 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 85 |
| Agent ergonomics (13%) | 95 | 90 |
| Security & auth (14%) | 92 | 50 |
| Payments & pricing (10%) | 30 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 91 | 85 |
| Transparency & trust (7%) | 85 | 72 |

| Fact (where they differ) | Claude Mythos 5.2 | Gemini 4 Hydrogen |
| --- | --- | --- |
| Vendor | Anthropic | Google |
| Hosted endpoint | `https://api.anthropic.com/v1` | `https://generativelanguage.googleapis.com/v1beta` |
| Licence | Closed model, used through the Claude API and cloud platforms under Anthropic's Commercial Terms of Service | Closed model, used through the Gemini API and Google's apps under Google's terms |
| Last release | 2026-11-09 | 2026-11-12 |
| Terms last updated | no date given | 2026-04-28 |
| Privacy policy last updated | no date given | 2026-10-01 |
| Customer content may train models | yes, with an opt-out | yes |
| Terms restrict automated access | not found in the text | yes |
| Arbitration or class-action waiver | yes | not found in the text |

Why the edge:
- Security & auth, Claude Mythos 5.2 +42: Claude Mythos 5.2 92 (Model reading for claude-mythos-5-2 on the Claude API.); Gemini 4 Hydrogen 50 (Model reading for gemini-4-hydrogen on the Gemini API.)
- Reliability, Claude Mythos 5.2 +15: Claude Mythos 5.2 60 (Model reading for claude-mythos-5-2 on the Claude API.); Gemini 4 Hydrogen 45 (Model reading for gemini-4-hydrogen on the Gemini API.)
- Transparency & trust, Claude Mythos 5.2 +13: Claude Mythos 5.2 85 (Model reading for claude-mythos-5-2 on the Claude API.); Gemini 4 Hydrogen 72 (Model reading for gemini-4-hydrogen on the Gemini API.)
- Payments & pricing, Gemini 4 Hydrogen +10: Claude Mythos 5.2 30 (Model reading for claude-mythos-5-2 on the Claude API.); Gemini 4 Hydrogen 40 (Model reading for gemini-4-hydrogen on the Gemini API.)
- Maintenance & community, Claude Mythos 5.2 +6: Claude Mythos 5.2 91 (Model reading for claude-mythos-5-2 on the Claude API.); Gemini 4 Hydrogen 85 (Model reading for gemini-4-hydrogen on the Gemini API.)
- Schema & documentation, Claude Mythos 5.2 +5: Claude Mythos 5.2 90 (Model reading for claude-mythos-5-2 on the Claude API.); Gemini 4 Hydrogen 85 (Model reading for gemini-4-hydrogen on the Gemini API.)