SmophyAI

Published daily · Next update 02:00 UTC

Real data comparison

Anthropic: Claude Fable 5.1 (batch) vs OpenAI: GPT-6 Astra (batch)

On quality, Anthropic: Claude Fable 5.1 (batch) leads (53.4 vs 52.8). In real production usage, OpenAI: GPT-6 Astra (batch) is used more (rank #45 vs #60 of 325).

  • Anthropic: Claude Fable 5.1 (batch)
  • OpenAI: GPT-6 Astra (batch)
Quality (Intelligence Index)53.4 / 52.8
Price ($/1M blended)$20.00 / $20.00
Average usage share0.32% / 0.50%
Best provider uptime100.0% / 100.0%
Coding index81.6 / 76.9
Agentic index58 / 51.5
Context window1,000,000 / 1,050,000
Quality per dollar2.7 pts/$ / 2.6 pts/$

Usage share over time

0.70%0.53%0.35%0.18%0.00%Share of usageSep 2Sep 5Sep 8
  • Anthropic: Claude Fable 5.1 (batch)
  • OpenAI: GPT-6 Astra (batch)

Frequently asked questions

Anthropic: Claude Fable 5.1 (batch) vs OpenAI: GPT-6 Astra (batch): which is better quality?

Anthropic: Claude Fable 5.1 (batch) scores higher on Artificial Analysis's Intelligence Index (53.4 vs 52.8).

Anthropic: Claude Fable 5.1 (batch) vs OpenAI: GPT-6 Astra (batch): which is cheaper?

Pricing data is unavailable for one or both models.

Anthropic: Claude Fable 5.1 (batch) vs OpenAI: GPT-6 Astra (batch): which is used more?

OpenAI: GPT-6 Astra (batch) has higher real OpenRouter usage share (rank #45 vs #60 of 325).

Source: OpenRouter (openrouter.ai/rankings), as of September 9, 2026.

Benchmark scores: Artificial Analysis (artificialanalysis.ai) via OpenRouter (openrouter.ai/rankings).

Methodology: www.smophy.ai/benchmark/methodology

Token counts originate from each provider's own tokenizer and are not directly comparable across providers.