💰 Unit Cost Winner GPT-6.1 Sol $2.00/1M in · $10.00/1M out
⚡ Latency & Speed Winner GPT-4o 280ms TTFT · 100 tok/s
💻 Coding (SWE) Winner GPT-6.1 Sol 86.4% SWE-bench · 96.8% HumanEval
🧠 STEM Reasoning Winner GPT-6.1 Sol 92.4% GPQA · 98.8% MATH-500

Which model is better: GPT-4o or GPT-6.1 Sol?

GPT-6.1 Sol is 20.0% cheaper for input tokens ($2.00 vs. $2.50 per 1M tokens) and $10.00 vs. $10.00 for output tokens (1.2x cost advantage). In terms of operational performance, GPT-4o delivers lower response latency at 280ms TTFT (240ms faster than GPT-6.1 Sol) with 100 vs. 135 tok/s throughput. GPT-6.1 Sol leads coding evaluations at 86.4% SWE-bench Verified vs. 48.0% for GPT-4o and 92.4% vs. 53.6% on GPQA Diamond.
Verified daily via automated API latency tests and official documentation.

Verified Performance & Unit Economics Delta (12 Dimensions)

Daily synchronized metrics across token pricing, prompt cache economics, latency, throughput, and 5 capability benchmarks.

Metric / Dimension GPT-4o GPT-6.1 Sol Net Delta / Advantage
Input Cost / 1M Tokens $2.50 $2.00 GPT-6.1 Sol is 1.3x cheaper
Output Cost / 1M Tokens $10.00 $10.00 Identical Output Pricing
Prompt Cache Read / 1M $1.250 $0.100 GPT-6.1 Sol is 12.5x cheaper
Prompt Cache Write / 1M $2.50 $2.00 GPT-6.1 Sol is 1.3x cheaper
Context Window (Max Output) 131k (16k out) 1,075k (128k out) GPT-6.1 Sol (8.2x larger context)
Avg TTFT Response Latency 280ms 520ms GPT-4o (240ms faster)
Generation Speed (Throughput) 100 tok/s 135 tok/s GPT-6.1 Sol (+35 tok/s faster)
SWE-bench Verified (Coding) 48% 86.4% GPT-6.1 Sol (+38.4% lead)
GPQA Diamond (PhD STEM) 53.6% 92.4% GPT-6.1 Sol (+38.8% lead)
MMLU-Pro (Multi-Discipline) 75.9% 91% GPT-6.1 Sol (+15.1% lead)
MATH-500 (Quantitative Logic) 76.6% 98.8% GPT-6.1 Sol (+22.2% lead)
Inference Value Score (IVR) 47.6 / 100 62.9 / 100 GPT-6.1 Sol (+15.3 pts)

Interactive Monthly Token Economics & ROI Forecaster

Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.

25.0M Tokens
500K 50M 250M 500M+
5.0M Tokens
100K 25M 75M 150M+
50% Cached
0% (Uncached) 25% 50% (Typical Agent) 95% Max

Estimated Monthly Spend

GPT-4o $96.88

$2.50/1M in · $10.00/1M out

Prompt Cache: $1.250/1M read · $2.50/1M write

GPT-6.1 Sol $76.25

$2.00/1M in · $10.00/1M out

Prompt Cache: $0.100/1M read · $2.00/1M write

Projected Monthly Cost Reduction
$20.63 / mo
(21.3% lower cost with GPT-6.1 Sol)
Open Full Matchup Analysis →
A

When to Choose GPT-4o

Choose GPT-4o (OpenAI) for general enterprise assistants, multimodal customer support, and structured JSON output pipelines — offering a 131k context window, 280ms TTFT, and $2.50/1M input pricing ($1.250/1M cached reads).

B

When to Choose GPT-6.1 Sol

Choose GPT-6.1 Sol (OpenAI) for delivers near-GPT-6 Astra frontier accuracy at one-fifth the token cost with a 95% cache read discount for high-efficiency agentic coding, computer use, and enterprise workflow automation — offering a 1,075k context window, 520ms TTFT, and $2.00/1M input pricing ($0.100/1M cached reads).

Related Questions & Decision Factors

Which is cheaper: GPT-4o or GPT-6.1 Sol?

GPT-6.1 Sol is cheaper at $2.00/1M input tokens ($10.00/1M output) compared to $2.50/1M input ($10.00/1M output) for GPT-4o.

Which model has lower TTFT latency and higher tok/s throughput: GPT-4o or GPT-6.1 Sol?

GPT-4o delivers faster first-token latency at 280ms TTFT (100 tok/s throughput) compared to 520ms TTFT (135 tok/s) for GPT-6.1 Sol.

How do GPT-4o and GPT-6.1 Sol compare on SWE-bench coding and GPQA Diamond reasoning?

On SWE-bench Verified software engineering, GPT-4o scores 48% versus 86.4% for GPT-6.1 Sol. On GPQA Diamond graduate-level STEM reasoning, GPT-4o scores 53.6% versus 92.4% for GPT-6.1 Sol (and 76.6% vs 98.8% on MATH-500).

When should you choose GPT-4o?

Choose GPT-4o (OpenAI) for general enterprise assistants, multimodal customer support, and structured JSON output pipelines — offering a 131k context window, 280ms TTFT, and $2.50/1M input pricing ($1.250/1M cached reads).

When should you choose GPT-6.1 Sol?

Choose GPT-6.1 Sol (OpenAI) for delivers near-GPT-6 Astra frontier accuracy at one-fifth the token cost with a 95% cache read discount for high-efficiency agentic coding, computer use, and enterprise workflow automation — offering a 1,075k context window, 520ms TTFT, and $2.00/1M input pricing ($0.100/1M cached reads).

Explore High-Priority Related Model Matchups