Fable 5
- TYPE
- Model
- SIGNALS
- 9
- FIRST SEEN
- Aug 19, 2026
- LAST SEEN
- Sep 4, 2026
Recent signals
- Artificial Analysis Coding Agent Index: GPT-6 Astra scored 67, roughly equal to Claude Opus 5, Fable 5, and Muse Spark 1.3, but trailing leader Fable 5.1's 70 (Artificial Analysis) Sep 4, 2026
- Claude Fable 5.1 made me a really nice animated pelican Sep 1, 2026
- Anthropic says Fable 5.1 "will cost an estimated 25% less than Fable 5 for typical workloads" and up to ~45% less for "highly agentic work" (Zac Hall/9to5Mac) Sep 1, 2026
- Anthropic prices Fable 5.1 at $10/1M input tokens and $50/1M output tokens, unchanged from Fable 5, and cuts cache read pricing by 75% to $0.25/1M tokens (Frederic Lardinois/The New Stack) Sep 1, 2026
- Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work Sep 1, 2026
- Anthropic Releases Claude Fable 5.1 and Claude Mythos 5.1: 52.6% on Terminal-Bench-Science and 75% Cheaper Cache Reads Sep 1, 2026
- Anthropic says Fable 5.1 will cost an estimated 25% less than Fable 5 for typical workloads and up to 45% less for highly agentic work (Rachel Metz/Bloomberg) Sep 1, 2026
- Ramp data: Fable 5, launched in June, has plateaued at ~11% of spending on Anthropic tools, as companies shift to cheaper models; Opus 5 surpassed Fable 5 Aug 24, 2026
- Z.ai's GLM-5.3 scores 60 on the Artificial Analysis Intelligence Index, seven points above GLM-5.2, on par with Kimi K3, but below Opus 5's 63 and Fable 5's 62 Aug 19, 2026