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Claude Fable 5

Anthropicflagship

Anthropic's June 9 2026 flagship and the first generally available model in the Mythos class: the new #1 overall. State-of-the-art on nearly every tested benchmark: SWE-bench Pro 80.3% (vs Opus 4.8 69.2%, GPT-5.5 58.6%), FrontierCode Diamond 29.3%, OSWorld-Verified computer use 85.0%, and a leading GDPval-AA knowledge-work Elo of 1932. Routes high-risk cyber/bio prompts to Opus 4.8 as a safety fallback. $10/$50 pricing (2x Opus 4.8) with a 90% prompt-caching discount; exact context window and max output were not officially disclosed at launch.

Context Window

1M

tokens

Max Output

64K

tokens

Input Price

$10

per 1M tokens

Output Price

$50

per 1M tokens

Speed

58

tokens/sec

Released

Jun 2026

2026-06-09

Blended Cost

$30.00

per 1M tokens

Value Score

3.3

quality per $

Capabilities

ChatVisionFunction CallingCode GenerationReasoning

Benchmarks

Quality Index
100
MMLU Pro
92
HumanEval (Coding)
98
MATH
95
Arena ELO
1525

Price vs Quality

6080100$1.00$10.00$100.00Blended cost per 1M tokens (log scale) →GPT-4o — $6.25/1M, quality 85GPT-4o Mini — $0.375/1M, quality 72o3 Mini — $2.75/1M, quality 88o3 — $5.00/1M, quality 94GPT-4.1 — $5.00/1M, quality 89Claude Opus 4 — $45.00/1M, quality 91Claude Sonnet 4 — $9.00/1M, quality 88Claude 3.5 Haiku — $2.40/1M, quality 75Gemini 2.5 Pro — $5.63/1M, quality 92Gemini 2.0 Flash — $0.250/1M, quality 74Llama 4 Maverick — $0.400/1M, quality 80Llama 4 Scout — $0.275/1M, quality 71Mistral Large 2 — $4.00/1M, quality 79Codestral — $0.600/1M, quality 76DeepSeek V3 — $0.685/1M, quality 86DeepSeek R1 — $1.37/1M, quality 91Grok 3 — $9.00/1M, quality 87Grok 3 Mini — $0.400/1M, quality 78Command R+ — $6.25/1M, quality 68Amazon Nova Pro — $2.00/1M, quality 70Qwen 2.5 72B — $0.600/1M, quality 80Qwen 2.5 Coder 32B — $0.300/1M, quality 74Sonar Pro — $9.00/1M, quality 78GPT-5.5 — $17.50/1M, quality 97GPT-5.5 Pro — $105.00/1M, quality 96Claude Opus 4.7 — $15.00/1M, quality 96Gemini 3.1 Pro — $7.00/1M, quality 96DeepSeek V4 Pro — $1.32/1M, quality 89DeepSeek V4 Flash — $0.210/1M, quality 84Qwen 3.6 Plus — $3.50/1M, quality 86Grok 4.3 — $1.88/1M, quality 93Kimi K2.6 — $2.11/1M, quality 92Kimi K3 — $9.00/1M, quality 97Claude Sonnet 4.6 — $9.00/1M, quality 90GLM-5.1 — $2.03/1M, quality 88Claude Opus 4.8 — $15.00/1M, quality 98Qwen 3.7 Max — $5.00/1M, quality 94MiniMax M3 — $1.50/1M, quality 89GPT-5.6 Sol — $17.50/1M, quality 98GPT-5.6 Terra — $7.00/1M, quality 93GPT-5.6 Luna — $0.700/1M, quality 83Gemini 3.6 Flash — $2.25/1M, quality 90Gemini 3.5 Flash-Lite — $1.40/1M, quality 79Claude Sonnet 5 — $9.00/1M, quality 93GLM-5.2 — $2.90/1M, quality 91Claude Opus 5 — $15.00/1M, quality 99Claude Mythos 5 — $30.00/1M, quality 100Grok 4.5 — $4.00/1M, quality 94Qwen3.8 Max — $4.00/1M, quality 96Claude Fable 5 — $30.00/1M, quality 100Claude Fable 5
Cheaper is left, more capable is up. Nothing in the directory is both cheaper and at least as capable. Self-host models are left off the price axis — their cost depends on the hardware you run them on, not on tokens.

Context Window in Context

  • ▸ Claude Fable 51M
  • GPT-4.11M
  • Gemini 2.5 Pro1M
  • Gemini 2.0 Flash1M
  • Llama 4 Maverick1M
  • GPT-5.51M
  • GPT-5.5 Pro1M
  • Claude Opus 4.71M
Bar length is logarithmic — each full step is 10× the tokens. Shown against the models with the nearest context windows, not the directory extremes.
Try in Playground Use via Swfte ConnectAnthropic Docs

Not on our gateway yet

Swfte Connect does not hold a key for Claude Fable 5, so there is nothing to run here. Add your own provider key and call it with the same API as every other model in this directory.

The request
curl https://api.swfte.com/agents/v2/gateway/chat/completions \
  -H "Authorization: Bearer $SWFTE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic:claude-fable-5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
Deploy this model with Swfte Connect

About Claude Fable 5

Claude Fable 5 is a flagship AI model by Anthropic, released on June 9, 2026. It supports a context window of 1000K tokens and can generate up to 64K output tokens.

At $10 per million input tokens and $50 per million output tokens, its blended cost of $30.00/1M tokens places it in the premium pricing tier. Its value score of 3.3 reflects the balance of quality and cost.

Using Claude Fable 5 with Swfte

Access Claude Fable 5 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try Claude Fable 5 in our AI Playground before integrating.

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