Anthropic unveiled Mythos 5, the latest iteration of its Mythos series, featuring significant improvements in reasoning tasks and reduced hallucination rates. The model shows particular strength in multi-step problem-solving, mathematical reasoning, and code generation.
In internal benchmarks, Mythos 5 outperforms OpenAI's GPT-5.5 on reasoning-focused tasks and matches it on general language understanding. Importantly, inference latency dropped by 35%, making the model more practical for latency-sensitive applications like real-time dialogue and streaming responses.
Available via Anthropic's API and through partner platforms, Mythos 5 pricing undercuts comparable models from competitors. Early adopters report the model's strength in domain-specific applications: legal document analysis, financial modeling, and scientific research.