Head-to-head · Updated Nov 3, 2026
GPT-6.1 Sol vs GPT-6 Astra
OpenAI’s GPT-6.1 Sol and OpenAI’s GPT-6 Astra on independent tests for professional work, cost and speed.
Short answer
GPT-6 Astra leads on 11 of 13 quality scores, including the overall Intelligence Index.
- FinanceGPT-6 Astra57.4 vs 56.2
- Legal workGPT-6 Astra55.6 vs 53.7
- HealthcareGPT-6 Astra53.7 vs 52.0
- EngineeringGPT-6 Astra61.8 vs 59.3
- Strategy & operationsGPT-6 Astra58.0 vs 57.6
- Coding agentsGPT-6 Astra59.1% vs 56.1%
- Expert knowledgeGPT-6 Astra54.7% vs 52.9%
- Fewer made-up answersGPT-6 Astra49.8% vs 51.9%
- Lower costGPT-6.1 Sol$1,124 vs $5,661
- SpeedGPT-6.1 Sol93 tok/s vs 73 tok/s
Scores, cost and speed
| Measure | GPT-6.1 Sol (Max) | GPT-6 Astra (Max) |
|---|---|---|
| Overall | ||
| Intelligence IndexCombined score across nine evaluations | 54.5 | Leads: 56.9 |
| Professional work | ||
| Finance & accounting | 56.2 | Leads: 57.4 |
| Legal | 53.7 | Leads: 55.6 |
| Healthcare & medical | 52.0 | Leads: 53.7 |
| Engineering | 59.3 | Leads: 61.8 |
| Strategy & operations | 57.6 | Leads: 58.0 |
| Economics | 57.4 | Leads: 58.3 |
| Specific tests | ||
| Terminal-Bench 4.0Agentic coding tasks | 56.1% | Leads: 59.1% |
| FrontierCode 2.0Hard programming problems | 40.6% | Leads: 42.4% |
| Humanity’s Last ExamExpert-level questions | 52.9% | Leads: 54.7% |
| HealthBenchHealth conversations graded by physicians’ rubrics | Leads: 58.5% | 58.2% |
| GDPval-AAKnowledge-work deliverables, Elo | Leads: 1609 | 1584 |
| Hallucination rateAA-Omniscience; lower is better | 51.9% | Leads: 49.8% |
| Cost & speed | ||
| Input priceUS$ per 1M tokens | Leads: $2 | $10 |
| Output priceUS$ per 1M tokens | Leads: $10 | $50 |
| Cost to run the indexUS$, includes reasoning tokens | Leads: $1,124 | $5,661 |
| Output speedMedian tokens per second | Leads: 93 tok/s | 73 tok/s |
| Context windowTokens | 1M | 1M |
Scores, prices and speeds: Artificial Analysis, independently measured, checked Nov 3, 2026. Model names include the tested reasoning setting. Stubbi has not rerun these evaluations. Consumer apps such as ChatGPT, Claude and Gemini may use other models and add features like search and memory.
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