GPT-6 Astra vs Muse Spark 1.1

Source-checked evaluation entries, evidence gaps and checked price quotes where available.

GPT-6 Astra

OpenAI
Text Arena1476 ± 6

GPT-6 Astra (Max). Board 2026-10-20; checked 2026-10-22.

Composite / MMLU estimatesWithheld
Standard short-context input quote / 1M tokens$10

OpenAI pricing · checked 2026-10-22. Context tiers and cache-hit rates may differ.

Muse Spark 1.1

Meta
Text Arena1490 ± 4

Muse Spark 1.1. Board 2026-10-20; checked 2026-10-22.

Composite / MMLU estimatesWithheld
Standard short-context input quote / 1M tokensNot verified

What the evidence supports

The recorded entries are GPT-6 Astra (Max) (1476 ± 6) and Muse Spark 1.1 (1490 ± 4).

Their point estimates differ by 14 points. The displayed ranges do not overlap; this is not a test of task-specific superiority or a guarantee about a different configuration.

The former composite, MMLU and cost-per-capability recommendations are withdrawn because their inputs included unsupported estimates. No upgrade or overall capability recommendation is made from those numbers.

Price quotes are from the selected provider registry checked 2026-10-22. Unverified legacy quotes are withheld. Use the token calculator for input, output, cache-hit and context-tier scenarios. Additional service charges and account-specific terms can change a bill. Missing pricing evidence does not mean free inference.

Reporting on OpenAI and Meta