Last refreshed 2026-11-09. Next refresh: weekly.
Why use Claude Fable 5.2 on Vercel AI Gateway?
Vercel AI Gateway offers Claude Fable 5.2 with pay-as-you-go pricing at $8.00/1M input tokens. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
Compare Claude Fable 5.2 across 5 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport AI_GATEWAY_API_KEY=...import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],anthropic/claude-fable-5.2Request example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="anthropic/claude-fable-5.2",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "anthropic/claude-fable-5.2", not the LLMReference slug "claude-fable-5-2".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; rename it only if your application config maps the new variable.
Compare Claude Fable 5.2 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Anthropic | $8.00 | $40.00 |
| AWS Bedrock | — | — |
| GCP Vertex AI | — | — |
| OpenRouter | $8.00 | $40.00 |
| Vercel AI Gateway | $8.00 | $40.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $8.00 |
| Output tokens | $40.00 |
Capabilities
About Claude Fable 5.2
Claude Fable 5.2 is Anthropic's generally available Mythos-class model for demanding reasoning and long-horizon agentic work, released November 9, 2026. It is the same underlying model as Claude Mythos 5.2 with cybersecurity and biology safeguards; requests those safeguards catch can fall back to other Claude models. Claude API id claude-fable-5-2. 1M-token context, 128K max output, adaptive thinking always on (default effort high), text and image input to text output. Knowledge cutoff June 2026. Anthropic documents model IDs for the Claude API, Amazon Bedrock, Claude Models on Google Cloud (Google-managed and Anthropic-managed), Microsoft Foundry and Claude Platform on AWS.