Claude Fable 5.1
Anthropic's 1 Sep 2026 refresh of Fable 5 and joint #1 on the Artificial Analysis Intelligence Index v4.3 at launch at 53, level with GPT-6 Astra (both since passed by Claude Opus 5.5 at 58 and Claude Sonnet 5.5 at 56 on v4.3.2). The two models also carry an identical sticker price of $10/$50, which makes everything else the deciding factor — and on cost per task Fable is the expensive one, at $7.63 against Astra's $3.26 for the same score, driven by verbosity (190M output tokens across the index versus a 90M median). The 98% cache discount is the counterweight: on workloads with heavy prompt reuse the blended rate falls to about $7.17 per 1M, and reuse-dominated traffic changes the arithmetic substantially. One hard constraint to design around: time to first token is 262.88s against a 3.73s median. That is thinking time rather than network latency, but it rules the model out of anything interactive regardless of the cause. 1M context, text and image in, text out, extended reasoning, served through 5 API providers. Anthropic has not published a parameter count.
1M
tokens
128K
tokens
$10
per 1M tokens
$50
per 1M tokens
68
tokens/sec
Sep 2026
2026-09-01
$30.00
per 1M tokens
3.3
quality per $
Capabilities
Benchmarks
Price vs Quality
Context Window in Context
- ▸ Claude Fable 5.11M
- 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
Ainda não está no nosso gateway
A Swfte Connect não tem uma chave para Claude Fable 5.1, então não há nada para executar aqui. Adicione a sua própria chave do provedor e chame-o com a mesma API de qualquer outro modelo deste diretório.
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-5-1",
"messages": [{"role": "user", "content": "Hello"}]
}'About Claude Fable 5.1
Claude Fable 5.1 is a flagship AI model by Anthropic, released on September 1, 2026. It supports a context window of 1000K tokens and can generate up to 128K 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 5.1 with Swfte
Access Claude Fable 5.1 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 5.1 in our AI Playground before integrating.