IQ of SI
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Automated page. Written and translated automatically by AI and checked against the sources by software; no human editor. SI-IQ is an index built from public benchmark results, not an IQ test. How it works

GPT-6 Astra vs GPT-6 Sol: which is smarter?

GPT-6 Astra has an SI-IQ of 150 and GPT-6 Sol has 140. The table compares them area by area using only independent benchmark results.

Data as of Oct 18, 2026 · method 1.0.0

MetricGPT-6 AstraGPT-6 Sol
SI-IQ150146–153140137–144
Reasoning154139
Math148143
Knowledge149138
DeveloperOpenAIOpenAI
ReleasedSep 3, 2026Sep 22, 2026
AccessAPI accessAPI access
Price in / out (USD per 1M tokens)$10 / $50$2.00 / $10
Benchmarks used99
GPT-6 AstraGPT-6 Sol
130140150160SI-IQReasoningMathKnowledge

Benchmarks every compared model was tested on

Raw scores as published by the evaluators.

BenchmarkGPT-6 AstraGPT-6 Sol
Chess Puzzles74.0%56.0%
FrontierMath Tier 497.6%90.0%
FrontierMath Tiers 1–393.7%89.8%
Furniture Assembly80.0%58.3%
GPQA Diamond95.8%94.3%
GPQA Diamond (OpenRouter run)94.7%92.1%
Mystery Game Puzzles84.0%56.0%
OTIS Mock AIME 2024–2025100.0%100.0%
SimpleQA Verified75.6%60.7%
τ²-bench Airline (OpenRouter run)67.7%70.2%

On SI-IQ, GPT-6 Astra is ahead by 9 points, and the 90% intervals do not overlap.

Data sources: Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0); LiteLLM, model_prices_and_context_window.json (MIT); Source: OpenRouter (openrouter.ai), licensed under CC BY 4.0: reuse and republish with attribution to OpenRouter (licences and changes).