model
Closed frontier model listed by Zhipu as 'Fable 5 (w/ fallback)' in its table and as 'Mythos 5' in its cyber section; described in the source as an Anthropic model and the leader on several benchmarks.
No evidence-backed relationships are recorded.
Ramp puts Anthropic at nearly 44% of its paying business users in July, OpenAI at nearly 40%. The lead is wider than in May, but the growth rate now runs the other way.
Reality
ThreatDown says the crime storefront Kriminal.ai is just Grok with the safety layer stripped off. That moves the control you depend on from your stack to someone else's.
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Anthropic's temporary weekly headroom lapses at 11:59 PM PT with prices unchanged. Teams that wired CI pipelines and sprint plans to borrowed capacity now pay the same for roughly a third less work.
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Eleven academic teams spent two months tuning on OfficeQA, then met a fresh benchmark on the day. The winner cleared 63.3 percent, and 18.8 percent of questions defeated every entrant.
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A production test across 15 models put seven of them inside a one-point spread on pass rate. On constrained payroll work, the price premium bought speed, not correctness.
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Greg Brockman warns an open-weight release due at the end of August will worsen the threat landscape, while OpenAI's strongest cyber model sits behind identity checks and hardware keys.
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A viral X post said an inference-time text layer put DeepSeek V4 Pro ahead of Fable 5 on every task. The report it points to shows single runs, nine benchmarks, and two losses.
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Silicon Data figures reported by the FT put the one-month drop at close to 25%. The pressure is coming from DeepSeek and Moonshot, not from OpenAI and Anthropic fighting each other.
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