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GPT-6.1 Sol Pro

OpenAI · OpenAI's reasoning heavyweight.

The Sol line is GPT-5.6's deliberate-reasoning tier — extended thinking budgets aimed at math, science and hard engineering, priced accordingly.

Live OpenRouter pricing · capability ratings & benchmarks are indicative

Context window

1.1M

tokens

Input · $/1M

$2.00

per million tokens

Output · $/1M

$10.00

per million tokens

Vs. cost floor

57×

output cost vs DeepSeek V4.1 Flash

Capability profile

Editorial ratings across six axes (0–100), compiled from publisher reports and public evals — indicative, not measured by TrendNexus.

Benchmark highs

AIME-class math≈99%

near-ceiling competition math

GPQA Diamond≈92%

expert science QA

SWE-bench Verified≈80%

real-repo engineering

MMMU≈85%

multimodal reasoning

Where it sits in the field

Output cost per million tokens across all 15 tracked flagships — GPT-6.1 Sol Pro highlighted.

Claude Fable 5.1$50.00GPT-5.5$30.00Claude Opus 5.5$20.00GPT-5.6 Terra Pro$12.00Gemini 3.1 Pro Preview$12.00GPT-6.1 Sol Pro$10.00Claude Sonnet 5.5$10.00Kimi K3$10.00GLM 5.3 Prime$8.80Grok 4.7$6.00Qwen3 Max$6.00Gemini 3.8 Flash$3.75DeepSeek V4 Pro 0423$0.879Llama 4 Maverick$0.652DeepSeek V4.1 Flash$0.175

What it's suited to build

Product classes where this model's profile wins — mockups are illustrative, not model output.

Research

Scientific analysis pipelines

Hypothesis exploration, proofs, quantitative modeling with verifiable steps.

Agents

Planning-heavy agents

Scheduling, optimization and constraint-solving backends.

Data & analytics

Quant & risk tooling

Financial modeling where the reasoning chain must survive audit.

Benchmark figures and capability ratings are indicative — compiled from publisher reports and public leaderboards, refreshed editorially, and not independently measured by TrendNexus. Verify against your own evals before procurement decisions. Pricing updates with the daily build.