3.6 KiB
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| 2026-07-02 | 2026-07-02 |
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Fable 5 (Anthropic) — Frontier Coding Model, Premium Pricing
TL;DR: Anthropic's Fable 5 is the public-facing version of Mythos 5 (cybersecurity-specialized). Redeployed 01.07.2026 with restrictions after June export-control crisis. Frontier coding quality (A+ in one-shot tests), but at 39× the cost of GLM 5.2 — the most expensive frontier model per token in our benchmark data.
Overview
| Property | Detail |
|---|---|
| Vendor | Anthropic |
| Status | Redeployed (restricted) — back online 01.07.2026 |
| Original launch | 09.06.2026, blocked 12.06.2026 |
| Relation to Mythos 5 | Public version of Mythos 5 (cybersecurity model) |
| Pricing | Premium — $3.12 for 62K tokens in atomic.chat benchmark |
| Cost per 1K tokens | $0.050 (highest in our dataset) |
| Quality grade | A+ (one-shot HTML5 Canvas physics, atomic.chat) |
Export Control Crisis (June 2026)
Fable 5 was at the center of the June 2026 export control crisis:
- 09.06.2026: Fable 5 public launch
- 12.06.2026: Blocked by Trump administration after Amazon researchers jailbroke it via prompt injection
- 01.07.2026: Redeployed with "massive restrictions"
See ../../tools/anthropic-claude.md for full timeline and ../policy/ai-regulation-2026.md for regulatory context.
Coding Benchmark Performance (atomic.chat, 01.07.2026)
| Metric | Value |
|---|---|
| Tokens generated | 62,158 |
| Cost | $3.12 |
| Grade | A+ (best in test) |
| Scenes won | All three (train derailment, mid-air collision, monster truck) |
| vs GLM 5.2 | 39× more expensive, 2 quality grades higher (A+ vs B+) |
| vs GPT 5.5 | 2.7× more expensive, 1 quality grade higher (A+ vs A−) |
| vs Opus 4.8 | 5.6× more expensive (Opus grade unspecified) |
Key finding: Fable 5 produces the best raw output, but at a cost premium that is hard to justify for production use cases where B+ quality is sufficient. The 39× cost spread vs GLM 5.2 is the largest measured in our wiki.
See coding-benchmark-price-performance.md for full benchmark analysis.
Positioning
Fable 5 occupies the premium frontier position:
| Dimension | Fable 5 | Competition |
|---|---|---|
| Quality | A+ (best measured) | GPT 5.5 (A−), GLM 5.2 (B+) |
| Cost | Highest ($3.12/62K) | GLM 5.2 ($0.08/36K) |
| Access | Restricted (export controls) | GLM 5.2 open-weights (MIT) |
| Specialization | Cybersecurity (via Mythos 5 lineage) | General coding |
The premium question: Is A+ worth 39× the cost of B+? For most production use cases, no. For mission-critical, zero-failure-tolerance tasks — possibly. The answer depends on the cost of verification vs. the cost of generation.
Cross-References
- ../../tools/anthropic-claude.md — Anthropic Claude family overview, export control timeline
- coding-benchmark-price-performance.md — Full atomic.chat benchmark analysis
- ../policy/ai-regulation-2026.md — Export control regulatory context
- ../../people/dario-amodei.md — Anthropic CEO, regulatory stance
- glm-5.2-zai-coding-model.md — 39× cheaper competitor
- chinese-model-cost-routing.md — Cost-routing thesis