| Signal | GPT-5.1 Chat | Delta | o3 Pro |
|---|---|---|---|
Capabilities | 83 | -17 | |
Benchmarks | 88 | 0 | |
Pricing | 90 | +70 | |
Context window size | 81 | -3 | |
Recency | 100 | +22 | |
Output Capacity | 70 | -13 | |
| Overall Result | 2 wins | of 6 | 4 wins |
Score History
86.6
current score
o3 Pro
right now
86.7
current score
OpenAI
OpenAI
GPT-5.1 Chat saves you $5375.00/month
That's $64500.00/year compared to o3 Pro at your current usage level of 100K calls/month.
| Metric | GPT-5.1 Chat | o3 Pro | Winner |
|---|---|---|---|
| Overall Score | 87 | 87 | o3 Pro |
| Rank | #23 | #21 | o3 Pro |
| Quality Rank | #23 | #21 | o3 Pro |
| Adoption Rank | #23 | #21 | o3 Pro |
| Parameters | -- | -- | -- |
| Context Window | 128K | 200K | o3 Pro |
| Pricing | $1.25/$10.00/M | $20.00/$80.00/M | -- |
| Signal Scores | |||
| Capabilities | 83 | 100 | o3 Pro |
| Benchmarks | 88 | 88 | o3 Pro |
| Pricing | 90 | 20 | GPT-5.1 Chat |
| Context window size | 81 | 84 | o3 Pro |
| Recency | 100 | 78 | GPT-5.1 Chat |
| Output Capacity | 70 | 83 | o3 Pro |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 87/100 (rank #23), placing it in the top 92% of all 290 models tracked.
Scores 87/100 (rank #21), placing it in the top 93% of all 290 models tracked.
With only a 0-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
GPT-5.1 Chat offers 89% better value per quality point. At 1M tokens/day, you'd spend $168.75/month with GPT-5.1 Chat vs $1500.00/month with o3 Pro - a $1331.25 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Higher benchmark score (0/100) indicates stronger performance on coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Faster response time (speed score 0/100) is critical for user-facing chat. GPT-5.1 Chat also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (200K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($10.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (87/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
GPT-5.1 Chat and o3 Pro are extremely close in overall performance (only 0.10000000000000853 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
Best for Quality
GPT-5.1 Chat
Marginally better benchmark scores; both are excellent
Best for Cost
GPT-5.1 Chat
89% lower pricing; better value at scale
Best for Reliability
GPT-5.1 Chat
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.1 Chat
Stronger community support and better developer experience
Best for Production
GPT-5.1 Chat
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-5.1 Chat | o3 Pro |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoningdiffers | ||
| Web Search | ||
| Image Output |
OpenAI
OpenAI
GPT-5.1 Chat saves you $117.75/month
That's 89% cheaper than o3 Pro at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | GPT-5.1 Chat | o3 Pro |
|---|---|---|
| Context Window | 128K | 200K |
| Max Output Tokens | 16,384 | 100,000 |
| Open Source | No | No |
| Created | Nov 13, 2025 | Jun 10, 2025 |
o3 Pro scores 87/100 (rank #21) compared to GPT-5.1 Chat's 87/100 (rank #23), giving it a 0-point advantage. o3 Pro is the stronger overall choice, though GPT-5.1 Chat may excel in specific areas like cost efficiency.
GPT-5.1 Chat is ranked #23 and o3 Pro is ranked #21 out of 290+ AI models. Rankings use a composite score combining benchmark performance (90%) from MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations, with capabilities and context window as tiebreakers (10%). Scores update hourly.
GPT-5.1 Chat is cheaper at $10.00/M output tokens vs o3 Pro's $80.00/M output tokens - 8.0x more expensive. Input token pricing: GPT-5.1 Chat at $1.25/M vs o3 Pro at $20.00/M.
o3 Pro has a larger context window of 200,000 tokens compared to GPT-5.1 Chat's 128,000 tokens. A larger context window means the model can process longer documents and conversations.