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AnthropicAdded Nov 9, 2026AnonymizedNew

Claude Fable 5.2

Claude Fable 5.2 improves on Claude Fable 5.1 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work such as long code refactors, front-end development, and finance and analysis tasks. It features a 1M token context window, 128K max output tokens, always-on adaptive thinking, and strong multimodal capabilities, and tends to be more concise in its plans and summaries.

claude-fable-5-2POST https://api.venice.ai/api/v1/chat/completions
Input / output
$8.00 / $40.00
per 1M tokens
Context
1M
128K max output
Reasoning
low, medium, high, xhigh, max
default high
Cached input
$0.20
98% off input
Modalities
Text, image
out: text

Pricing

USD per 1M tokens
Input
$8.00
Cached input
$0.20
Cache write
$10.00
Output incl. reasoning
$40.00
Similar modelsInputOutputOutput price, relative
Claude Fable 5.2$8.00$40.00
GPT-6 Astra$10.00$50.00
GPT-6 Astra Pro$10.00$50.00
GPT-6.1 Sol Ultrafast$12.00$60.00
Kimi K3.1 Pro Highspeed$5.00$25.00

Prompt caching is automatic; see Prompt caching.

Specs

Model ID
claude-fable-5-2
Endpoint
POST /api/v1/chat/completions
Context window
1,000,000 tokens
Max output
128,000 tokens
Reasoning effort
reasoning_effort: low | medium | high | xhigh | max · default high · guide
Served precision
Set by the upstream provider
Added
Nov 9, 2026

Capabilities

Modalities
Text
Input and output
Image
Input only · up to 10
Audio
Not supported
Video
Not supported
Features
Streaming (SSE)
Supported
Function calling
Supported
Structured output (json_schema)
Supported
Reasoning effort
low, medium, high, xhigh, max
Prompt caching
Supported
Web search
venice_parameters
X search
Not supported
Log probabilities
Not supported
Fine-tuning
Not supported
Image generation
Not supported

API

Get an API key
POST/api/v1/chat/completionsRecommended
curl https://api.venice.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-fable-5-2",
    "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }],
    "reasoning_effort": "high"
  }'

Privacy

Tier 1 · this model
Anonymized

Venice hides your identity and stores no prompts. Anthropic still sees the content.

Tier 2
Private

Not available

Tier 3
TEE

Not available

Tier 4
End-to-end encrypted

Not available