Claude Fable 5

Claude Fable 5 is the premier mythos-class model for elite coding and multi-day projects. This new claude generation offers state-of-the-art vision and agentic capabilities for your most ambitious enterprise software development workflows.

Modalities

Context

API Usage Examples

curl --request POST "https://gptproto.com/v1/chat/completions" \
  --header "Authorization: Bearer $GPTPROTO_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "model": "claude-fable-5",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

Claude Fable 5 pricing

Estimate a request with real work scenarios. GPTProto token pricing is 10% below official rates.

UsageQuantityRateCost

Input tokens($9/1M)

tokens

$9/1M$0.0135

Output tokens($45/1M)

tokens

$45/1M$0.036

Cache write tokens($11.25/1M)

tokens

$11.25/1M$0.0337

Cache read tokens($0.9/1M)

tokens

$0.9/1M$0.0225

Cost per request$0.1057

Requests

Top-up amount

Top-up $100 and you get:

Top-up credits with permanent validity. You will receive a total of $100.00.

Additional 10% model discount, saving $11.0374 versus direct official Claude API calls.

Related Models

All Models

Claude Fable 5

Current

byClaude1M context$9/M input$45/M output

Hy4 Preview

byHunyuan$0.7923/M input$2.376/M output

GPT 6 Astra

byOpenAI1.05M context$8/M input$40/M output

Gemini 3.8 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Claude Fable 5.1

byClaude1M context$9/M input$45/M output

Qwen3.8 Max 0902

byQwen1M context$1.8/M input$5.4/M output

GLM 5.3 Flash

byZ-AI1.31M context$0.15/M input$0.5/M output

DeepSeek v4 Flash Vision Exp

byDeepSeek1.05M context$0.44/M input$1.32/M output

GLM 5.3

byZ-AI1.31M context$1.26/M input$3.96/M output

Gemini 3.7 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Grok 4.6

byGrok500K context$1.2/M input$3.6/M output

Qwen3.8 Max

byQwen1M context$1.8/M input$5.4/M output

Claude Opus 5

byClaude1M context$4.5/M input$22.5/M output

Gemini 3.6 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Kimi K3

byMoonshotAI1.05M context$2.7/M input$13.5/M output

GPT 5.6 Luna

byOpenAI1.05M context$0.16/M input$0.96/M output

GPT 5.6 Terra

byOpenAI1.05M context$1.6/M input$9.6/M output

Grok 4.5

byGrok500K context$1.2/M input$3.6/M output

Claude Sonnet 5

byClaude1M context$1.8/M input$9/M output

MiniMax M3

byMiniMax1.05M context$0.48/M input$0.96/M output

GLM 5.2

byZ-AI1.05M context$1.26/M input$3.96/M output

Qwen3.7 Max

byQwen1M context$0.36/M input$1.44/M output

Claude Opus 4.8 Thinking

byClaude1M context$4.5/M input$22.5/M output

Claude Opus 4.8

byClaude1M context$4.5/M input$22.5/M output

DeepSeek v4 Flash

byDeepSeek1.05M context$0.374/M input$1.122/M output

DeepSeek v4 Pro

byDeepSeek1.05M context$1.122/M input$3.366/M output

Grok 4.3

byGrok1M context$0.75/M input$1.5/M output

Kimi K2.6

byMoonshotAI262K context$0.855/M input$3.6/M output

Claude Opus 4.7 Thinking

byClaude1M context$4.5/M input$22.5/M output

MiniMax M2.5

byMiniMax205K context$0.24/M input$0.96/M output

Kimi K2.5

byMoonshotAI262K context$0.54/M input$2.7/M output

Doubao Seed 1.6 Thinking (Build 250715)

byBytedance262K context$0.0971/M input$0.9714/M output

Doubao Seed 1.6 Thinking (Build 250615)

byBytedance262K context$0.0971/M input$0.9714/M output

Doubao Seed 1.6 Flash (Build 250615)

byBytedance262K context$0.0182/M input$0.1821/M output

Model					Input → Output
Claude Fable 5Current $		1M	$9.00 / $45.00 per 1M	$11.25 / $0.90 per 1M	Input: TextInput: Document Output: Text
Hy4 Preview $		—	$0.79 / $2.38 per 1M	— / $0.04 per 1M	Input: Text Output: Text
GPT 6 Astra $		1.05M	$8.00 / $40.00 per 1M	$10.00 / $0.80 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.8 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text
Claude Fable 5.1 $		1M	$9.00 / $45.00 per 1M	$11.25 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Qwen3.8 Max 0902 $		1M	$1.80 / $5.40 per 1M	$2.25 / $0.23 per 1M	Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text
GLM 5.3 Flash $	—	1.31M	$0.15 / $0.50 per 1M	— / $0.03 per 1M	Input: TextInput: ImageInput: VideoInput: Document Output: Text
DeepSeek v4 Flash Vision Exp $	—	1.05M	$0.44 / $1.32 per 1M	— / $0.01 per 1M	Input: TextInput: Image Output: Text
GLM 5.3 $		1.31M	$1.26 / $3.96 per 1M	— / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.7 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: Document Output: Text
Grok 4.6 $		500K	$1.20 / $3.60 per 1M	— / $0.30 per 1M	Input: TextInput: Image Output: Text
Qwen3.8 Max $		1M	$1.80 / $5.40 per 1M	$2.25 / $0.23 per 1M	Input: TextInput: ImageInput: VideoInput: Document Output: Text
Claude Opus 5 $		1M	$4.50 / $22.50 per 1M	$5.63 / $0.45 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.6 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: Document Output: Text
Kimi K3 $		1.05M	$2.70 / $13.50 per 1M	$0.27 / $0.27 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Luna $		1.05M	$0.16 / $0.96 per 1M	$0.20 / $0.02 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Terra $		1.05M	$1.60 / $9.60 per 1M	$2.00 / $0.16 per 1M	Input: TextInput: ImageInput: Document Output: Text
Grok 4.5 $		500K	$1.20 / $3.60 per 1M	$0.30 / $0.30 per 1M	Input: TextInput: Image Output: Text
Claude Sonnet 5 $		1M	$1.80 / $9.00 per 1M	$2.25 / $0.18 per 1M	Input: TextInput: Document Output: Text
MiniMax M3 $		1.05M	$0.48 / $0.96 per 1M	$0.10 / $0.10 per 1M	Input: TextInput: ImageInput: Document Output: Text
GLM 5.2 $		1.05M	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Qwen3.7 Max $		1M	$0.36 / $1.44 per 1M	$0.07 / $0.07 per 1M	Input: TextInput: Document Output: Text
Claude Opus 4.8 Thinking $		1M	$4.50 / $22.50 per 1M	$5.63 / $0.45 per 1M	Input: TextInput: Document Output: Text
Claude Opus 4.8 $		1M	$4.50 / $22.50 per 1M	$5.63 / $0.45 per 1M	Input: TextInput: Document Output: Text
DeepSeek v4 Flash $		1.05M	$0.37 / $1.12 per 1M	— / $0.01 per 1M	Input: Text Output: Text
DeepSeek v4 Pro $		1.05M	$1.12 / $3.37 per 1M	— / $0.04 per 1M	Input: Text Output: Text
Grok 4.3 $		1M	$0.75 / $1.50 per 1M	$0.12 / $0.12 per 1M	Input: TextInput: Image Output: Text
Kimi K2.6 $		262K	$0.85 / $3.60 per 1M	$0.14 / $0.14 per 1M	Input: TextInput: Document Output: Text
Claude Opus 4.7 Thinking $		1M	$4.50 / $22.50 per 1M	$5.63 / $0.45 per 1M	Input: TextInput: Document Output: Text
MiniMax M2.5 $		205K	$0.24 / $0.96 per 1M	$0.30 / $0.02 per 1M	Input: TextInput: Document Output: Text
Kimi K2.5 $		262K	$0.54 / $2.70 per 1M	$0.09 / $0.09 per 1M	Input: TextInput: Document Output: Text
Doubao Seed 1.6 Thinking (Build 250715) $		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Thinking (Build 250615) $		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Flash (Build 250615) $		262K	$0.02 / $0.18 per 1M	—	Input: TextInput: Image Output: Text

Key Claude Fable 5 Features

Harness the power of a mythos-class model for your most ambitious enterprise coding workflows and research.

Agentic Coding Autonomy

Claude 5 performs multi-day autonomous coding tasks, planning stages and delegating to sub-agents with fable 5 intelligence.

Mythos-Class Reasoning

Handles complex knowledge work with minimal oversight, producing novel first-principles outputs for enterprise workflows.

Advanced Multimodal Vision

Claude fable 5 interprets detailed figures and tables in documents, verifying its own coding work via visual feedback.

Secure Enterprise Fallback

Requests flagged by safeguards route to Opus 4.8, ensuring safe usage of fable 5 without compromising on project momentum.

Claude Fable 5 Frequently Asked Questions

Find expert answers regarding Claude Fable 5 pricing, fable 5 coding capabilities, and the mythos 5 fallback safety system for enterprise users.

What is the pricing for Claude Fable 5?

Claude Fable 5 is priced at $10 per million input tokens and $50 per million output tokens. For organizations building on the Claude platform, this pricing supports the fable 5 mythos-level intelligence required for elite coding. Additionally, prompt caching offers a 90% discount on input tokens, making long-horizon projects more cost-effective for developers handling ambitious, multi-day asynchronous tasks.

How does the Claude Fable 5 fallback work?

To ensure safety, Claude Fable 5 uses classifiers to detect requests involving cybersecurity or biology. If a query is flagged, it automatically routes to the Opus 4.8 model. Users only pay for the intelligence they receive, and they won't be charged fable 5 rates for rerouted requests. This mechanism preserves the reliability of the mythos 5 infrastructure while maintaining robust ethical safeguards for general use.

Can Claude Fable 5 handle autonomous coding?

Yes, Claude is built for agentic coding. In a harness like Claude Code, fable 5 can work for days, planning across multiple stages and delegating tasks to sub-agents. It proactively writes its own tests to check implementations, making it the most capable Claude model for large-scale software migrations and complex engineering projects that require high-fidelity results and minimal supervision throughout the lifecycle.

What is the data retention policy for Claude 5?

Using the fable 5 or mythos 5 models requires a 30-day data retention period for safety monitoring. This data is not used to train new Claude models but helps defend against novel jailbreak attempts. Anthropic has instituted strict privacy protections, including logging all human access to ensure your enterprise coding data remains secure and is deleted after the 30-day window in almost all cases.

How does Fable 5 compare to Claude Mythos 5?

Claude Fable 5 is the generally available version of the underlying mythos-class model. While Fable 5 includes active classifiers for cybersecurity and biology research, Claude Mythos 5 has these specific safeguards lifted for vetted partners. Both models share the same elite coding capabilities and 5th-generation intelligence, but Mythos 5 is currently restricted to specialized research programs like Project Glasswing.

Is Claude Fable 5 available for vision tasks?

Claude 5 is state-of-the-art for vision. It extracts precise data from diagrams, charts, and tables nested in PDFs. For coding projects, Claude uses its vision capabilities to check UI outputs against original design goals. This allows fable 5 to rebuild web applications from screenshots alone, demonstrating a level of multimodal reasoning that far exceeds previous model generations and competitor benchmarks.