Claude Mythos 5 is the strongest alternative to Claude Fable 5 — it matches it on coding (100/100) at $10/1M input (Claude Fable 5 costs $10/1M). Claude Opus 4.8 is the budget swap: $5/1M input is 50% cheaper. DeepSeek V3 is the top open-weight option if you want a model you can self-host.
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 V3 is the better pick when response speed matters more than maximum reasoning depth.
Claude Mythos 5 matches Claude Fable 5 on coding (100/100) at $10/1M input tokens.
Claude Opus 4.8 cuts input cost by 50% ($5 vs $10/1M) while scoring 100/100 on coding.
DeepSeek V3 is open-weight — self-host it or run it via low-cost API providers at $0.27/1M input.
Choose Claude Mythos 5 when you want the closest overall replacement — frontier cybersecurity research.
Choose Claude Opus 4.8 when token volume matters more than peak quality — it is 50% cheaper on input.
Staying with Anthropic? Claude Mythos 5 is the strongest in-house switch at $10/1M input.
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
New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.
Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.
You are latency- or cost-sensitive, or your tasks don't need frontier-level reasoning — Opus 4.8 at half the price is plenty.
The fastest way to see where the recommendation shifts when your priority changes.
New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.
The frontier ceiling — same model as Fable 5, safeguards lifted, partner-only.
New #1 on SWE-Bench Pro — parallel subagents, same price as Opus 4.7.
GPT-4o-class coding quality at under $0.30/1M — the best value in the directory.
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
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Claude Mythos 5 is the strongest overall alternative. It scores 100/100 on coding (Claude Fable 5: 100/100) and costs $10/1M input vs $10/1M. The frontier ceiling — same model as Fable 5, safeguards lifted, partner-only.
Claude Opus 4.8 at $5/1M input — 50% cheaper than Claude Fable 5's $10/1M. It scores 100/100 on coding, so expect a quality step down on the hardest tasks.
Yes — DeepSeek V3 is the strongest open-weight alternative (coding: 87/100). You can self-host it or use hosted APIs at $0.27/1M input, and there are no per-seat subscription fees.
Claude Mythos 5 — same provider, same API surface, $10/1M input vs $10/1M. The frontier ceiling — same model as Fable 5, safeguards lifted, partner-only.
The strongest coding and reasoning model you can actually use today.