Claude Fable 5
Newer version available: Claude Fable 5.1
- Family
- Claude Fable
- Released
- 2026-06-09
- Context
- 1M
- Max output
- 128K
- Architecture
- Decoder Only
- Specialization
- general
- Openness
- Proprietary
- License
- ProprietaryRestricted
- Weights
- Not released
- Code
- Unknown
- Training
- Pretrained
Cheapest of 8 routes · Anthropic · cache read $1.00
About
Anthropic's most capable widely released model, built for demanding reasoning and long-horizon agentic work. Claude Fable 5 is the generally available Mythos-class Claude model, supports vision, tool use, structured outputs, prompt caching, Batch API processing, adaptive thinking that is always on, a 1M-token context window, and up to 128k output tokens. It launched on the Claude API, AWS Bedrock, Vertex AI, and Microsoft Foundry on June 9, 2026 with first-party pricing at $10 per 1M input tokens and $50 per 1M output tokens.
Providers(8)
Compare all 8Compare API pricing across 8 tracked provider routes for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Batch in / out | Cache | Route |
|---|---|---|---|---|---|
| Anthropic | $10.00 | $50.00 | $5.00 / $25.00 | read $1.00 / 5m $12.50 / 1h $20.00 | Serverless |
| GCP Vertex AI | $10.00 | $50.00 | - | read $1.00 / 5m $12.50 | Serverless |
| Microsoft Foundry | $10.00 | $50.00 | - | - | Serverless |
| OpenRouter | $10.00 | $50.00 | - | read $1.00 | Serverless |
| Replicate API | $10.00 | $50.00 | - | - | Serverless |
| Vercel AI Gateway | $10.00 | $50.00 | - | read $1.00 / 5m $12.50 | Serverless |
| AWS Bedrock | $11.00 | $55.00 | - | read $1.10 / 5m $13.75 / 1h $22.00 | Serverless |
| Databricks Foundation Model Serving | - | - | - | - | ServerlessPartial |
Available via routers & gateways(16)
LiteLLM
GatewayOpen-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.
OpenRouter
HybridUnified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.
Portkey
GatewayProduction AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.
AIRouter
RouterCommercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.
Amazon Bedrock Intelligent Prompt Routing
RouterAWS Bedrock's native intelligent prompt router that routes prompts between Anthropic Claude model tiers (Haiku/Sonnet) based on predicted task complexity, with no extra per-routing charge.
Azure AI Foundry Model Router
RouterMicrosoft Azure AI Foundry's native model router that uses a trained ML model to route each prompt in real time to the optimal Azure-hosted model, with Balanced/Cost/Quality mode selection and automatic failover.
Capabilities
Benchmark peer barsfor Coding
Benchmark scores(14)
| Benchmark | Score | Version | Evaluation | Source |
|---|---|---|---|---|
| 80.3 | SWE-bench ProObserved 2026-06-09 | — | ||
| 96.0 | Vals.ai harness (weighted avg by difficulty tier)Observed 2026-06-09 | — | ||
| 85.0 | OSWorld-VerifiedObserved 2026-06-09 | — | ||
| 1932.0 | GDPval-AA ELOObserved 2026-06-09 | — | ||
| 38.6 | Blueprint-Bench 2Observed 2026-06-09 | — | ||
| 17.4 | AutomationBenchObserved 2026-06-09 | — | ||
| 13.3 | Legal Agent BenchmarkObserved 2026-06-09 | — | ||
| 29.8 | GDP.pdf vision, no toolsObserved 2026-06-09 | — | ||
| 72.9 | CursorBench 3.1Observed 2026-06-30 | Configuration: Fable 5 Max Harness: CursorBench 3.1 Evaluator: Cursor Confidence: confirmed Notes: Highest CursorBench 3.1 score across Cursor's published effort configurations for this base model. | ||
| 70.5 | CursorBench 3.2Observed 2026-07-18 | Configuration: Fable 5 Max Harness: CursorBench 3.2 productized Cursor-agent workflow Evaluator: Cursor Confidence: confirmed Cost/task: $17.32 Tokens/task: 103,525 Steps/task: 72 Notes: Cursor vendor-reported result; not independently reproducible. Results are subject to variance, and small score differences may not be statistically meaningful. | ||
| 68.4 | CursorBench 3.2Observed 2026-07-18 | Configuration: Fable 5 Extra High Harness: CursorBench 3.2 productized Cursor-agent workflow Evaluator: Cursor Confidence: confirmed Cost/task: $11.73 Tokens/task: 64,971 Steps/task: 56 Notes: Cursor vendor-reported result; not independently reproducible. Results are subject to variance, and small score differences may not be statistically meaningful. | ||
| 66.5 | CursorBench 3.2Observed 2026-07-18 | Configuration: Fable 5 High Harness: CursorBench 3.2 productized Cursor-agent workflow Evaluator: Cursor Confidence: confirmed Cost/task: $8.77 Tokens/task: 43,747 Steps/task: 48 Notes: Cursor vendor-reported result; not independently reproducible. Results are subject to variance, and small score differences may not be statistically meaningful. | ||
| 65.2 | CursorBench 3.2Observed 2026-07-18 | Configuration: Fable 5 Medium Harness: CursorBench 3.2 productized Cursor-agent workflow Evaluator: Cursor Confidence: confirmed Cost/task: $6.80 Tokens/task: 30,366 Steps/task: 41 Notes: Cursor vendor-reported result; not independently reproducible. Results are subject to variance, and small score differences may not be statistically meaningful. | ||
| 62.1 | CursorBench 3.2Observed 2026-07-18 | Configuration: Fable 5 Low Harness: CursorBench 3.2 productized Cursor-agent workflow Evaluator: Cursor Confidence: confirmed Cost/task: $4.46 Tokens/task: 18,182 Steps/task: 31 Notes: Cursor vendor-reported result; not independently reproducible. Results are subject to variance, and small score differences may not be statistically meaningful. |
Migration checks
No linked migration route is available for this model yet.
Rankings & picks(3)
Comparison and alternatives
Browse all comparisons →Cheapest of 8 routes · Anthropic · cache read $1.00