Claude Mythos 5
Restricted-access flagship — vetted partners only.
Reference benchmarks for Claude Mythos 5
These are external benchmarks I pulled from the source comparison guides on agentos.guide — SWE-bench Verified, DRACO, Kilo plan rubric, build-time measurements, vendor-reported coding scores. They are not goldiebench medal scores (those come only from same-prompt one-shot creative coding tasks in the matrix). I surface them here so the spec sheet for Claude Mythos 5 is honest about what's measured.
What is Claude Mythos 5?
Claude Mythos 5 is the Anthropic frontier model with a 200,000 tokens context window, released 2026-06-09. Tagline: Restricted-access flagship — vetted partners only.. Official source: anthropic.com/claude.
Pricing detail. Mythos 5 is the un-released sibling of Fable 5. Same Mythos class, restricted to vetted partners. Made headlines mid-June 2026 when reports of a White-House-driven ban over China access dominated AI press.
How I use it inside the Agent OS. Not currently dispatched from Agent OS — no public API. Tracked for news coverage only.
What I built with Claude Mythos 5
Every model on Goldie Bench gets the same fixed prompt set — one shot, single HTML file out — and I score the result 0–10 inside the Agent Operating System. Here's what Claude Mythos 5 shipped on the bench: 0 one-shot demos across 200,000 tokens of context. Of those, 0 are scored against the field with my honest 0–10 from the source guides at agentos.guide.
Strengths
- Highest-class Anthropic model — sits above Fable 5 in the Mythos line
- Same Mythos-class capability profile as Fable 5 (with restrictions)
Trade-offs
- No public API access — can't be benched against the open field
- Restricted distribution makes it effectively unavailable to most builders
Best for
- Vetted enterprise partners with Mythos-class access
- (For everyone else: read the Mythos ban coverage instead of waiting for access)
Every demo by Claude Mythos 5
0 live demos, sorted by category. Click any tile to play the actual one-shot result. Verdicts and 0–10 scores are pulled from the source guides where I posted them publicly.
Compare Claude Mythos 5 against every other model
Every head-to-head featuring Claude Mythos 5. Verdicts shown for scored pairs.
See all 66 comparisons across every model →
Quick pill index
Direct comparisons against every other scored model on the bench:
Claude Mythos 5 vs Fusion Claude Mythos 5 vs Claude Opus 5 Claude Mythos 5 vs Hermes MoA Claude Mythos 5 vs GPT-5.6 Sol Claude Mythos 5 vs Claude Fable 5 Claude Mythos 5 vs Qwen 3.8 Claude Mythos 5 vs Grok Claude Mythos 5 vs MiniMax M3 Claude Mythos 5 vs Fugu Ultra Claude Mythos 5 vs Kimi K3 Claude Mythos 5 vs GLM-5.2 Claude Mythos 5 vs Fugu Mini Claude Mythos 5 vs Opus 4.8 Claude Mythos 5 vs Kimi K2.7 Claude Mythos 5 vs Qwable 5 27B Coder Claude Mythos 5 vs Gemini 3.6 Flash Claude Mythos 5 vs Claude Sonnet 5 Claude Mythos 5 vs Qwen 3.7 Claude Mythos 5 vs Fugu Ultra 1.1 Claude Mythos 5 vs Inkling Claude Mythos 5 vs Agents-A1 Claude Mythos 5 vs Gemma 4 12B · MLX Claude Mythos 5 vs Laguna XS 2.1 Claude Mythos 5 vs Qwythos 9B Claude Mythos 5 vs LongCat-2.0 Claude Mythos 5 vs Hy3 Claude Mythos 5 vs Gemma-4 12B CoderRead more on agentos.guide: /claude-fable-5, /mythos-ban, /claude-mythos-ban, /claude-ban-part-2, /mythos-fable-5-research-report
Claude Mythos 5 — frequently asked
What is Claude Mythos 5?
Claude Mythos 5 is Anthropic's AI model — Restricted-access flagship — vetted partners only. It has a 200K tokens context window and was released 2026-06-09.
How good is Claude Mythos 5 at coding and one-shot builds?
It has 0 live demos on GoldieBench but no curated 0-10 verdicts yet — it is unranked until scored.
How much does Claude Mythos 5 cost?
Restricted access — vetted partners only. Mythos 5 is the un-released sibling of Fable 5. Same Mythos class, restricted to vetted partners. Made headlines mid-June 2026 when reports of a White-House-driven ban over China access dominated AI press.
Where can I see Claude Mythos 5 demos?
Every one-shot build is live and playable on this page and on the GoldieBench compare matrix — same prompt as every other model, no retries.
Run this stack yourself.
Every demo on this bench was built inside the Agent Operating System — one prompt, one shot, single HTML file out. The Agent OS, the prompts, the templates, the weekly walkthroughs and 4,000+ founders shipping with it every day all live inside the AI Profit Boardroom.