Anthropic · launched 9 Nov 2026
Claude Fable 5.2
Released alongside the access-limited Claude Mythos 5.2. Tokens cost 20% less than Fable 5.1, with output generated up to 30% faster and an optional fast mode at $16 input and $80 output.
Read the official announcementModel details
- Vendor
- Anthropic
- Launch date
- 9 Nov 2026
- Input price
- $8.00 / 1M tokens
- Output price
- $40 / 1M tokens
- Cached input
- $0.20 / 1M tokens
- Batch discount
- 50%
- Context window
- 1M tokens
- Max output
- 128K tokens
- Input types
- Text, Image, File
- API model ID
- claude-fable-5-2
Compared with Claude Fable 5.1
Input price
$8.00
was $10 · 20% cheaper
Output price
$40
was $50 · 20% cheaper
Blended price
$16
was $20 · 20% cheaper
Best published results
- FrontierCode 2.0xhigh effort · $14.2 per task · reported by Anthropic49.1%
- WANDRmax effort · $53.1 per attempt · reported by Anthropic82.1%
- Humanity's Last Exam (tools)max effort · $4.51 per attempt · reported by Anthropic74.2%
- Chartography (no tools)max effort · $0.75 per attempt · reported by Anthropic73.4%
Price compared with other models
| Model | Launched | Input / 1M | Output / 1M | Cached / 1M | Blended / 1M | vs Claude Fable 5.2 |
|---|---|---|---|---|---|---|
| Claude Haiku 5.5AnthropicListed prices and comparisons apply to prompts up to 100K tokens. Above 100K, input costs $0.50, output $2.50 and cache reads $0.05 per million tokens. | 7 Oct 2026 | $0.10 | $0.50 | $0.01 | $0.20 | 99% cheaper |
| GPT-6 LunaOpenAI | 22 Sept 2026 | $0.10 | $0.50 | $0.01 | $0.20 | 99% cheaper |
| GPT-5.6 LunaOpenAI | 9 Jul 2026 | $0.20 | $1.20 | $0.02 | $0.45 | 97% cheaper |
| Gemini 3.5 Flash-LiteGoogle DeepMindText, image, video and audio inputs share the listed rate. Cache storage and grounding are billed separately. | 21 Jul 2026 | $0.30 | $2.50 | $0.03 | $0.85 | 95% cheaper |
| Gemini 3.8 FlashGoogle DeepMindIntroductory rates through 31 December 2026. From 1 January 2027, input is $1.50, output $7.50 and cached input $0.15 per million tokens. Cache storage and grounding are billed separately. | 2 Sept 2026 | $0.75 | $3.75 | $0.075 | $1.50 | 91% cheaper |
| Claude Haiku 4.5Anthropic | 15 Oct 2025 | $1.00 | $5.00 | $0.10 | $2.00 | 88% cheaper |
| GPT-6.1 TerraOpenAIListed rates apply up to 272K input tokens. Above 272K, input costs $2, cached input $0.10 and output $7.50 per million tokens for the full request. | 26 Oct 2026 | $1.00 | $5.00 | $0.05 | $2.00 | 88% cheaper |
| Grok 4.7SpaceXAIBase rates apply up to 200K context tokens; higher-context requests use different rates. Batch API is not supported. The separate fast variant costs twice as much. | 21 Sept 2026 | $2.00 | $6.00 | $0.50 | $3.00 | 81% cheaper |
| Claude Sonnet 5Anthropic | 30 Jun 2026 | $2.00 | $10 | $0.20 | $4.00 | 75% cheaper |
| Claude Sonnet 5.5AnthropicCache reads were reduced from $0.20 to $0.10 per million tokens on 7 October 2026. | 28 Sept 2026 | $2.00 | $10 | $0.10 | $4.00 | 75% cheaper |
| Gemini 4 ArgonGoogle DeepMindIntroductory rates through 30 November 2026. From 1 December 2026, input is $4, output $20 and cached input $0.20 per million tokens. Caching is implicit only. Long decode raises the output limit to 1,048,576 tokens. | 30 Sept 2026 | $2.00 | $10 | $0.10 | $4.00 | 75% cheaper |
| GPT-6 SolOpenAIListed rates apply up to 272K input tokens. Above 272K, input costs $4, cached input $0.40 and output $15 per million tokens for the full request. | 22 Sept 2026 | $2.00 | $10 | $0.20 | $4.00 | 75% cheaper |
| GPT-6.1 SolOpenAIListed rates apply up to 272K input tokens. Above 272K, input costs $4, cached input $0.20 and output $15 per million tokens for the full request. | 29 Sept 2026 | $2.00 | $10 | $0.10 | $4.00 | 75% cheaper |
| Gemini 3.1 ProGoogle DeepMind · PreviewRates apply to prompts up to 200K tokens. Above 200K, input is $4, output $18 and cached input $0.40 per million tokens. Cache storage and grounding are billed separately. | 19 Feb 2026 | $2.00 | $12 | $0.20 | $4.50 | 72% cheaper |
| GPT-5.6 TerraOpenAIOpenAI's model documentation supports the Batch API but does not list a batch price. | 9 Jul 2026 | $2.00 | $12 | $0.20 | $4.50 | 72% cheaper |
| Claude Opus 5.5Anthropic | 22 Sept 2026 | $4.00 | $20 | $0.20 | $8.00 | 50% cheaper |
| GPT-5.6 SolOpenAIPrice before the GPT-6 launch, from OpenAI's announcement. OpenRouter now lists $2 / $10. | 9 Jul 2026 | $4.00 | $20 | – | $8.00 | 50% cheaper |
| Claude Opus 5Anthropic | 24 Jul 2026 | $5.00 | $25 | $0.50 | $10 | 38% cheaper |
| Claude Fable 5.2Anthropic | 9 Nov 2026 | $8.00 | $40 | $0.20 | $16 | Baseline |
| Claude Fable 5Anthropic | 9 Jun 2026 | $10 | $50 | $1.00 | $20 | 25% more |
| Claude Fable 5.1Anthropic · previous generation | 1 Sept 2026 | $10 | $50 | $0.25 | $20 | 25% more |
| GPT-6 AstraOpenAI | 4 Sept 2026 | $10 | $50 | $1.00 | $20 | 25% more |
GPT-6.1 Sol and GPT-6 Sol rates were checked on 8 October 2026 against OpenAI model documentation. USD per million tokens, checked 2 Oct 2026 via OpenRouter. Comparison uses the blended price (3 input tokens for every output token). Haiku 5.5 and Sonnet 5.5 prices were updated from Anthropic's 7 October 2026 announcement. Gemini and Grok prices were rechecked against official Google and xAI documentation on 27 October 2026. GPT-6.1 Terra prices were checked against OpenAI documentation on 27 October 2026. Claude Fable 5.2 prices are from Anthropic's 9 November 2026 announcement.
Official benchmark results
Claude Fable 5.2 launch results
Reported by Anthropic on 9 Nov 2026 · exact values
| Benchmark | Claude Fable 5.2 | Claude Fable 5.1 | Claude Opus 5.5 | GPT-6 Astra |
|---|---|---|---|---|
| FrontierCode 2.0Agentic coding | 49.1% | 32.4% | 45.5% | 42.8% |
| FrontierSWE v2Agentic coding | 69.9% | 56.3% | 62.3% | 65.5% |
| AutomationBenchBusiness workflows | 51.4% | 31.4% | 42.5% | 41.4% |
| Terminal-Bench-Science 0.1Agentic scientific research | 74.6% | 52.6% | 58.7% | 68.1% |
| WANDRAgentic search · relaxed score | 82.1% | 68.7% | 72.3% | – |
| OSWorld 2.1Computer use · offline set, partial | 89.3% | 83.5% | 87.2% | 79.5% |
| RoboDojo SimRobotics | 64.9% | 27.6% | 39.4% | 29.8% |
| AA-Briefcase v1.1Knowledge work · rubric | 66.1% | 61.5% | 61.2% | 52% |
| AA-Briefcase v1.1 (Elo)Knowledge work | 1785 Elo | 1669 Elo | 1800 Elo | 1569 Elo |
| Remote Labor IndexKnowledge work | 41.3% | 17.9% | 21.3% | 20.8% |
| Humanity's Last ExamMultidisciplinary reasoning · with tools | 74.2% | 65.6% | 67.7% | 57.2% |
| ChartographyVisual chart recognition · no tools | 73.4% | 44.8% | 64.4% | 71% |
- Bold marks the best reported score in each row.
- Scores for the Claude models are with production safeguards on and at each model's highest effort, except FrontierCode 2.0 (Fable 5.2 and 5.1 at xhigh) and Remote Labor Index (Fable 5.2 at high).
- Claude Mythos 5.2, the same underlying model with access limited to vetted organizations, scores 75.3% on Terminal-Bench-Science 0.1. The cybersecurity and protein design rows report Mythos scores, so they are not shown here.
- Anthropic's table also includes Gemini 4 Carbon, which has no published API price, so it is not tracked here. RoboDojo Sim scores were run internally by Anthropic.
- A dash means the lab did not report a result for that model.
FrontierCode 2.0
Accuracy against cost · reported by Anthropic on 9 Nov 2026 · exact values
Whether a model's code changes would be merged by the maintainers of open-source repositories.
- Claude Fable 5.2
- Claude Opus 5.5
- Claude Fable 5.1
- GPT-6 Astra
Show data table
| Model | Effort | Score | Cost per task |
|---|---|---|---|
| Claude Fable 5.2 | low | 34.2% | $2.10 |
| Claude Fable 5.2 | medium | 37.6% | $2.48 |
| Claude Fable 5.2 | high | 45.3% | $6.72 |
| Claude Fable 5.2 | xhigh | 49.1% | $14.2 |
| Claude Fable 5.2 | max | 45.6% | $44.7 |
| Claude Opus 5.5 | low | 14.7% | $0.75 |
| Claude Opus 5.5 | medium | 30.1% | $1.70 |
| Claude Opus 5.5 | high | 34.5% | $2.42 |
| Claude Opus 5.5 | xhigh | 43.4% | $5.18 |
| Claude Opus 5.5 | max | 45.5% | $12.8 |
| Claude Fable 5.1 | low | 20.6% | $3.01 |
| Claude Fable 5.1 | medium | 21.5% | $3.89 |
| Claude Fable 5.1 | high | 25.7% | $5.39 |
| Claude Fable 5.1 | xhigh | 32.4% | $8.68 |
| Claude Fable 5.1 | max | 31.7% | $11.5 |
| GPT-6 Astra | low | 31.1% | $2.44 |
| GPT-6 Astra | medium | 36.8% | $3.49 |
| GPT-6 Astra | high | 38.3% | $4.28 |
| GPT-6 Astra | xhigh | 41.4% | $4.54 |
| GPT-6 Astra | max | 42.8% | $6.68 |
- Exact score and cost values from the chart data published with Anthropic's announcement.
- Anthropic's chart also shows Gemini 4 Carbon, which has no published API price, so it is not tracked here.
WANDR (relaxed score)
Accuracy against cost · reported by Anthropic on 9 Nov 2026 · exact values
Perplexity's benchmark of agents on large data-collection tasks.
- Claude Fable 5.2
- Claude Opus 5.5
- Claude Fable 5.1
Show data table
| Model | Effort | Score | Cost per attempt |
|---|---|---|---|
| Claude Fable 5.2 | low | 71.4% | $12.7 |
| Claude Fable 5.2 | medium | 73.6% | $15.7 |
| Claude Fable 5.2 | high | 79.3% | $29.2 |
| Claude Fable 5.2 | xhigh | 80.6% | $39.8 |
| Claude Fable 5.2 | max | 82.1% | $53.1 |
| Claude Opus 5.5 | low | 31.2% | $1.25 |
| Claude Opus 5.5 | medium | 62.8% | $11.4 |
| Claude Opus 5.5 | high | 67.3% | $17.3 |
| Claude Opus 5.5 | xhigh | 71.3% | $29.3 |
| Claude Opus 5.5 | max | 72.3% | $38.7 |
| Claude Fable 5.1 | low | 63.3% | $24.4 |
| Claude Fable 5.1 | medium | 64.5% | $28.8 |
| Claude Fable 5.1 | high | 66.7% | $37.6 |
| Claude Fable 5.1 | xhigh | 67.7% | $44.5 |
| Claude Fable 5.1 | max | 68.7% | $51.1 |
- Exact score and cost values from the chart data published with Anthropic's announcement.
Humanity's Last Exam, with tools
Pass rate against cost · reported by Anthropic on 9 Nov 2026 · exact values
Expert-level questions across many disciplines, answered with access to tools.
- Claude Fable 5.2
- Claude Opus 5.5
- Claude Fable 5.1
Show data table
| Model | Effort | Pass rate | Cost per attempt |
|---|---|---|---|
| Claude Fable 5.2 | low | 68.4% | $0.19 |
| Claude Fable 5.2 | medium | 68.6% | $0.21 |
| Claude Fable 5.2 | high | 71.5% | $0.63 |
| Claude Fable 5.2 | xhigh | 73.4% | $1.48 |
| Claude Fable 5.2 | max | 74.2% | $4.51 |
| Claude Opus 5.5 | low | 57.4% | $0.08 |
| Claude Opus 5.5 | medium | 63% | $0.17 |
| Claude Opus 5.5 | high | 63.9% | $0.29 |
| Claude Opus 5.5 | xhigh | 66.4% | $0.69 |
| Claude Opus 5.5 | max | 67.7% | $2.18 |
| Claude Fable 5.1 | low | 60.2% | $0.59 |
| Claude Fable 5.1 | medium | 62.4% | $0.85 |
| Claude Fable 5.1 | high | 63.1% | $1.37 |
| Claude Fable 5.1 | xhigh | 65.2% | $2.70 |
| Claude Fable 5.1 | max | 65.6% | $3.77 |
- Exact score and cost values from the chart data published with Anthropic's announcement.
- GPT-6 Astra scores 57.2% at max effort; Anthropic reports no cost for it.
Chartography, no tools
Accuracy against cost · reported by Anthropic on 9 Nov 2026 · exact values
How accurately a model reads charts and figures.
- Claude Fable 5.2
- Claude Opus 5.5
- Claude Fable 5.1
Show data table
| Model | Effort | Score | Cost per attempt |
|---|---|---|---|
| Claude Fable 5.2 | low | 64.2% | $0.03 |
| Claude Fable 5.2 | medium | 66.4% | $0.03 |
| Claude Fable 5.2 | high | 69.8% | $0.07 |
| Claude Fable 5.2 | xhigh | 71.4% | $0.15 |
| Claude Fable 5.2 | max | 73.4% | $0.75 |
| Claude Opus 5.5 | low | 57% | $0.02 |
| Claude Opus 5.5 | medium | 59% | $0.03 |
| Claude Opus 5.5 | high | 59.2% | $0.03 |
| Claude Opus 5.5 | xhigh | 62.4% | $0.08 |
| Claude Opus 5.5 | max | 64.4% | $0.49 |
| Claude Fable 5.1 | low | 36.6% | $0.03 |
| Claude Fable 5.1 | medium | 42.2% | $0.05 |
| Claude Fable 5.1 | high | 46% | $0.08 |
| Claude Fable 5.1 | xhigh | 47% | $0.38 |
| Claude Fable 5.1 | max | 44.8% | $0.87 |
- Exact score and cost values from the chart data published with Anthropic's announcement.
- GPT-6 Astra scores 71.0% at max effort and Gemini 4 Carbon 72.5%; Anthropic reports no cost for either.