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Claude Fable 5.1 vs Grok-2 Image 1212

Comparing Claude Fable 5.1 and Grok-2 Image 1212 across benchmarks, pricing, and capabilities.

Anthropic · xAI · Updated for 2026

Which is better?

Claude Fable 5.1 and Grok-2 Image 1212 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

Claude Fable 5.1 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Fable 5.1

  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose Grok-2 Image 1212

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

Claude Fable 5.1
Anthropic
Grok-2 Image 1212
xAI
Benchmark wins
—
—
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
131,072

Individual benchmarks

7 reported for Claude Fable 5.1 · 0 for Grok-2 Image 1212

No common benchmarks found

Claude Fable 5.1 and Grok-2 Image 1212don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Claude Fable 5.1 accepts 1,000,000 input tokens compared to Grok-2 Image 1212's 131,072 tokens. Only Claude Fable 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Fable 5.1
Input1,000,000 tokens
Output128,000 tokens
xAI
Grok-2 Image 1212
Input131,072 tokens
Output- tokens
Sun Sep 20 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Fable 5.1 supports multimodal inputs, whereas Grok-2 Image 1212 does not.

Claude Fable 5.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Fable 5.1

Text
Images
Audio
Video

Grok-2 Image 1212

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Fable 5.1

Proprietary

Closed source

Grok-2 Image 1212

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Fable 5.1 was released on 2026-09-01, while Grok-2 Image 1212 was released on 2024-12-12.

Claude Fable 5.1 is 21 months newer than Grok-2 Image 1212.

Claude Fable 5.1

Sep 1, 2026

2 weeks ago

1.7yr newer
Grok-2 Image 1212

Dec 12, 2024

1.8 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Fable 5.1 is available from Anthropic. Grok-2 Image 1212 is available from xAI.

Claude Fable 5.1

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

Grok-2 Image 1212

xai logo
xAI
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Fable 5.1 and Grok-2 Image 1212 side-by-side, then vote on the output you prefer.

Claude Fable 5.1
✓ Preferred
Grok-2 Image 1212
Open in Playground

FAQ

Common questions about Claude Fable 5.1 vs Grok-2 Image 1212.

Which is better, Claude Fable 5.1 or Grok-2 Image 1212?

Claude Fable 5.1 (Anthropic) and Grok-2 Image 1212 (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Claude Fable 5.1 compare to Grok-2 Image 1212 in benchmarks?

Claude Fable 5.1 scores OSWorld 2.0: 77.9%, CursorBench v3.2: 73.4%, Humanity's Last Exam: 65.0%, GDPval-AA: 61.8%, Terminal-Bench 4.0: 55.8%.

What are the context window sizes for Claude Fable 5.1 and Grok-2 Image 1212?

Claude Fable 5.1 supports 1.0M tokens and Grok-2 Image 1212 supports 131K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Fable 5.1 and Grok-2 Image 1212?

Key differences include context window (1.0M vs 131K), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5.1 and Grok-2 Image 1212?

Claude Fable 5.1 is developed by Anthropic and Grok-2 Image 1212 is developed by xAI.

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