Claude Mythos 5 wins on coding (100 vs 84) and writing quality and context window (1M vs 128K). DeepSeek R1 wins on price ($0.55 vs $10/1M input). For most workflows, Claude Mythos 5 is the stronger default — the frontier ceiling — same model as fable 5, safeguards lifted, partner-only.
The shortest way to see the safest default, the lower-cost option, and the specialist pick before you read deeper.
Claude Mythos 5 is the safest overall answer here when you want the strongest default instead of the lowest list price.
Meta: Llama 3.1 8B Instruct is the lower-cost option to start with when you still need useful output at scale.
DeepSeek R1 is the better pick when response speed matters more than maximum reasoning depth.
Claude Mythos 5 leads on coding with a score of 100 vs 84 for DeepSeek R1.
Claude Mythos 5 has the larger context window: 1M vs 128K for DeepSeek R1.
DeepSeek R1 is cheaper at $0.55/1M input tokens vs $10/1M for Claude Mythos 5.
Choose Claude Mythos 5 for coding and research — frontier cybersecurity research.
Choose DeepSeek R1 when math.
DeepSeek R1 is the more cost-efficient option at $0.55/1M — worth considering if token volume is a concern.
Switch the scoring lens to see whether the top answer changes when you care more about cost, speed, or long-document work.
Anthropic / Premium / Jun 9, 2026
The frontier ceiling — same model as Fable 5, safeguards lifted, partner-only.
Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.
You don't have vetted-partner access or don't need lifted safeguards — Fable 5 is the same model, generally available, at the same price.
The fastest way to see where the recommendation shifts when your priority changes.
The frontier ceiling — same model as Fable 5, safeguards lifted, partner-only.
Open-source o1-class reasoning at a fraction of the cost.
80.3% SWE-Bench Pro — tied with Fable 5 as the highest public coding score of any model
Safeguards lifted in some areas for advanced security and research workloads
Excels at complex, multi-step cybersecurity tasks under partner access
Same 1M-token context and 1932 GDPval-AA score as Fable 5
Not generally available — limited to vetted partners after Project Glasswing's private preview
Most teams should use Fable 5, which is the same model with standard safeguards
Premium $10/$50 pricing and a deliberate, high-latency profile
UseRightAI recommendations are based on practical decision factors people actually feel in day-to-day use.
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Claude Mythos 5 wins on more categories — coding, research, long context. DeepSeek R1 is the better pick when math. The right choice depends on your specific use case.
DeepSeek R1 is cheaper at $0.55/1M input and $2.19/1M output. Claude Mythos 5 costs $10/1M input and $50/1M output.
Claude Mythos 5 has the larger context window at 1M tokens vs DeepSeek R1's 128K. For large document analysis, Claude Mythos 5 is the stronger pick.
Claude Mythos 5 is better for coding with a score of 100 vs DeepSeek R1's 84 (out of 100). Claude Fable 5 is the overall coding leader in this directory at 100/100.
Claude Mythos 5 is faster with a deliberate speed rating (score: 2) vs DeepSeek R1's deliberate rating (score: 1).