Pairwise benchmark snapshot · Aug 17, 2026
In this head-to-head showdown, GPT-4.5 Orion delivers higher overall intelligence and human-preferred responses (Elo 1,540 vs 1,512), while GPT-4.5 Orion leads in SWE-bench software engineering benchmarks (71%), while OpenAI: o1 is more budget-friendly at $60/1M per 1M output tokens, while GPT-4.5 Orion provides faster response streaming (60 tok/s). Review the complete breakdown below to determine which model best fits your performance and budget requirements.
OpenAI largest dense non-reasoning model with expansive world knowledge and reduced hallucinations.
Auto-discovered from OpenRouter (openai/o1). Preview until a second source matches.
Simulate accuracy gains vs added response time & token cost
Reasoning models “think before answering” by generating internal reasoning tokens. Higher effort improves math, coding, and logic accuracy, but increases response delay and token costs.
Δ 28 Arena Elo pts
60 tok/s
$60 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.
Category wins across reasoning intelligence, generation speed, and token cost.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
| Benchmark | GPT-4.5 Orion | OpenAI: o1 | Advantage Delta |
|---|---|---|---|
| Preference Elo | GPT-4.5 Orion (+28) | ||
| Coding Elo | GPT-4.5 Orion (+35) | ||
| LiveBench | GPT-4.5 Orion (+3.1%) | ||
| SWE-bench | GPT-4.5 Orion (+22.1%) | ||
| GPQA Diamond | GPT-4.5 Orion (+6%) | ||
| Time to first token | GPT-4.5 Orion (+70 ms) | ||
| Output speed | 60 tok/s | 45 tok/s | GPT-4.5 Orion (+15 tok/s) |
| Input price | OpenAI: o1 (+$60/1M) | ||
| Output price | $150/1M | OpenAI: o1 (+$90/1M) | |
| Context window | OpenAI: o1 (+72k) |
Simulate monthly production API costs in USD (US Dollar).
OpenAI: o1 is estimated to save $3,450.00/month ($41,400/year).
Higher SWE-bench (71%).
Lower output list price ($60/1M).
Lower TTFT (350 ms).
Larger window (200k).
Both accept images. Defaulting to the higher-Elo side (GPT-4.5 Orion).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | GPT-4.5 Orion | Higher SWE-bench (71%). |
| High-volume chat | OpenAI: o1 | Lower output list price ($60/1M). |
| Voice / low-latency UI | GPT-4.5 Orion | Lower TTFT (350 ms). |
| Long-document RAG | OpenAI: o1 | Larger window (200k). |
| Screenshots / vision | GPT-4.5 Orion | Both accept images. Defaulting to the higher-Elo side (GPT-4.5 Orion). |
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Verified head-to-head card
