Anthropic's new Mythos-class flagship and the most capable coding model anyone can use — 80.3% SWE-Bench Pro, an 11-point jump over Opus 4.8. 1M context, 128K output, native parallel subagents. Released June 9, 2026.
Verdict
New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.
Quality score
98%
Pricing
$10.00/1M in
$50.00/1M out
Speed
Deliberate
Best for the hardest coding tasks, autonomous multi-step agents, and frontier-grade reasoning
Context
1M tokens
Launched June 9, 2026 as the public, Mythos-class release. Available on the Claude API, Microsoft Foundry, and Google Vertex AI. Free for all users until June 22, 2026. Same underlying model as Claude Mythos 5, with safeguards that block specific high-risk cyber responses.
Coding leaderSWE-Bench Pro #1Mythos-classParallel subagentsAgenticLong contextPremiumNew
Best for
The hardest coding tasks, autonomous multi-step agents, and frontier-grade reasoning
Anthropic's most powerful frontier model — the same underlying model as Fable 5 with safeguards lifted in some areas, restricted to vetted enterprise and research partners. The capability ceiling of mid-2026.
Verdict
The frontier ceiling — same model as Fable 5, safeguards lifted, partner-only.
Quality score
98%
Pricing
$10.00/1M in
$50.00/1M out
Speed
Deliberate
Best for frontier cybersecurity research, autonomous vulnerability discovery, and the absolute capability ceiling
Context
1M tokens
Launched June 9, 2026 alongside Fable 5, following the April Project Glasswing private preview on Google Cloud. Restricted to vetted enterprise and research partners due to advanced cybersecurity capabilities. Same underlying model and benchmarks as Claude Fable 5.
FrontierRestricted accessCybersecuritySWE-Bench Pro #1Mythos-classPremiumNew
Best for
Frontier cybersecurity research, autonomous vulnerability discovery, and the absolute capability ceiling
Anthropic's newest Opus flagship — 69.2% SWE-Bench Pro, 88.6% SWE-Bench Verified, 1890 Arena Elo (121 pts ahead of GPT-5.5), and native parallel subagents. Same $5/$25 price as Opus 4.7.
Verdict
Best value premium coder — frontier-grade at half of Fable 5's price.
Quality score
97%
Pricing
$5.00/1M in
$25.00/1M out
Speed
Deliberate
Best for hardest coding tasks, parallel agentic workflows, and high-fidelity vision
Context
1M tokens
Launched May 27, 2026. Available on Claude API, AWS Bedrock, Google Vertex AI, Microsoft Foundry, and GitHub Copilot. Fast mode available at $10/$50 per 1M tokens.
CodingParallel subagentsAgenticLong contextPremiumBest value premium
Best for
Hardest coding tasks, parallel agentic workflows, and high-fidelity vision
Claude Opus 4.6 is best for agentic coding, complex multi-step reasoning, and deep research. It is a strong fit when that workflow matters more than the tradeoffs around premium pricing and deliberate speed.
When should I avoid Claude Opus 4.6?
You want the current premium coding leader, need lower cost, or are starting a new integration.
What is a cheaper alternative to Claude Opus 4.6?
Grok 4.5 is the lower-cost option to compare first when you want a similar workflow fit with less token spend.
What is a faster alternative to Claude Opus 4.6?
Claude Fable 5 is the better pick when response time matters more than maximum depth or premium quality.
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