New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.
100
Coding
98
Writing
100
Research
88
Images
16
Value
99
Long Context
Published benchmarks
93.4%
SWE-bench
1,932
Arena Elo
94.2%
MMLU
83.5%
GPQA
97.4%
MATH
Use this when
The hardest coding tasks, autonomous multi-step agents, and frontier-grade reasoning
Skip this if
You are latency- or cost-sensitive, or your tasks don't need frontier-level reasoning — Opus 4.8 at half the price is plenty.
Pricing
$10.00/1M in
$50.00/1M out
→0%since Jun 2026
Context
1M tokens
Speed
Deliberate
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.
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
New #1 on SWE-Bench Pro — parallel subagents, same price as Opus 4.7.
Quality score
97%
Pricing
$10.00/1M in
$50.00/1M 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.
Coding leaderSWE-bench Pro #1Parallel subagentsAgenticLong contextPremiumNew
Best for
Hardest coding tasks, parallel agentic workflows, and high-fidelity vision
Claude 3.5 Sonnet is Anthropic's mid-cycle flagship model, balancing strong reasoning, coding, and instruction-following with a 200K context window. It sits between Haiku and Opus in Anthropic's lineup, offering near-flagship quality at a lower cost than top-tier models.
Verdict
One of the best models for coding and complex instruction-following, but its premium pricing demands premium use cases.
Quality score
81%
Pricing
$6.00/1M in
$30.00/1M out
Speed
Balanced
Best for complex coding tasks, multi-step reasoning, and long-document analysis where gpt-4o-class quality is needed without paying for the absolute top tier.
Context
200k tokens
Pricing at $6 input / $30 output per million tokens is significantly higher than GPT-4o ($2.50/$10). Best accessed via Anthropic API or Amazon Bedrock. Claude 3.5 Sonnet (October 2024 version) supersedes the June 2024 release with improved performance.
Pricing moves, ranking shifts, and capability updates.
New ModelJun 9, 2026
Claude Fable 5 & Mythos 5 launch — new #1 model
Anthropic released Claude Fable 5 and Claude Mythos 5 on June 9, 2026, two months after Mythos rocked Wall Street in private preview. Fable 5 — the generally available, Mythos-class model — scores 80.3% on SWE-Bench Pro, an 11-point leap over Opus 4.8's 69.2% and the largest single-release jump of 2026. It posts 1932 on GDPval-AA, has a 1M-token context, and is free for everyone until June 22. Mythos 5 is the same model with safeguards lifted, restricted to vetted partners. Pricing is $10/$50 per 1M tokens.
Claude Fable 5 now leads all premium coding and research recommendations, replacing Opus 4.8 at the top. At 80.3% SWE-Bench Pro it is the clear benchmark leader. Opus 4.8 remains the best-value premium pick at half the price, and Sonnet 4.6 stays the everyday default.
Claude Fable 5 is best for the hardest coding tasks, autonomous multi-step agents, and frontier-grade reasoning. It is a strong fit when that workflow matters more than the tradeoffs around premium pricing and deliberate speed.
When should I avoid Claude Fable 5?
You are latency- or cost-sensitive, or your tasks don't need frontier-level reasoning — Opus 4.8 at half the price is plenty.
What is a cheaper alternative to Claude Fable 5?
Mistral: Mistral Nemo 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 Fable 5?
Anthropic: Claude 3.5 Sonnet is the better pick when response time matters more than maximum depth or premium quality.
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