Models, measured side by side
GPT-5.2 Pro vs Sonar Reasoning Pro
Compare GPT-5.2 Pro, Sonar Reasoning Pro by token pricing, context length, benchmark results, speed and tool support.
Monthly workload
Monthly cost breakdown
InputOutput
GPT-5.2 Pro
$1,260 / mo
Sonar Reasoning Pro
$80 / mo
Performance comparison
GPT-5.2 Pro
Not listed
Sonar Reasoning Pro
11.8
Overview
| Overview | GPT-5.2 Pro | Sonar Reasoning Pro |
|---|---|---|
| Provider | OpenAI | Perplexity |
| Released | 2025-12 | 2025-03-07 |
| Status | Active | Active |
| Input formats | imagetextfile | textimage |
| Output formats | text | text |
Provider
- GPT-5.2 Pro
- OpenAI
- Sonar Reasoning Pro
- Perplexity
Released
- GPT-5.2 Pro
- 2025-12
- Sonar Reasoning Pro
- 2025-03-07
Status
- GPT-5.2 Pro
- Active
- Sonar Reasoning Pro
- Active
Input formats
- GPT-5.2 Pro
- imagetextfile
- Sonar Reasoning Pro
- textimage
Output formats
- GPT-5.2 Pro
- text
- Sonar Reasoning Pro
- text
Pricing & capacity
| Pricing & capacity | GPT-5.2 Pro | Sonar Reasoning Pro |
|---|---|---|
| Input / 1M tokens | $21 | $2.00 |
| Output / 1M tokens | $168 | $8.00 |
| Monthly cost | $1,260 | $80 |
| Context window | 400K | 128K |
| Maximum output | 128K | 115K |
Input / 1M tokens
- GPT-5.2 Pro
- $21
- Sonar Reasoning Pro
- $2.00
Output / 1M tokens
- GPT-5.2 Pro
- $168
- Sonar Reasoning Pro
- $8.00
Monthly cost
- GPT-5.2 Pro
- $1,260
- Sonar Reasoning Pro
- $80
Context window
- GPT-5.2 Pro
- 400K
- Sonar Reasoning Pro
- 128K
Maximum output
- GPT-5.2 Pro
- 128K
- Sonar Reasoning Pro
- 115K
Benchmarks & performance
| Benchmarks & performance | GPT-5.2 Pro | Sonar Reasoning Pro |
|---|---|---|
| Arena Elo | 1,255 | Not listed |
| MMLU-Pro | 82.8% | Not listed |
| Intelligence Index | Not listed | 11.8 |
Arena Elo
- GPT-5.2 Pro
- 1,255
- Sonar Reasoning Pro
- Not listed
MMLU-Pro
- GPT-5.2 Pro
- 82.8%
- Sonar Reasoning Pro
- Not listed
Intelligence Index
- GPT-5.2 Pro
- Not listed
- Sonar Reasoning Pro
- 11.8
Tools & features
| Tools & features | GPT-5.2 Pro | Sonar Reasoning Pro |
|---|---|---|
| Function calling | Supported | Not listed |
| Structured outputs | Supported | Not listed |
| JSON mode | Supported | Not listed |
| Reasoning | Supported | Supported |
| Built-in web search | Not listed | Supported |
| Deterministic seed | Supported | Not listed |
Function calling
- GPT-5.2 Pro
- Supported
- Sonar Reasoning Pro
- Not listed
Structured outputs
- GPT-5.2 Pro
- Supported
- Sonar Reasoning Pro
- Not listed
JSON mode
- GPT-5.2 Pro
- Supported
- Sonar Reasoning Pro
- Not listed
Reasoning
- GPT-5.2 Pro
- Supported
- Sonar Reasoning Pro
- Supported
Built-in web search
- GPT-5.2 Pro
- Not listed
- Sonar Reasoning Pro
- Supported
Deterministic seed
- GPT-5.2 Pro
- Supported
- Sonar Reasoning Pro
- Not listed
API & availability
| API & availability | GPT-5.2 Pro | Sonar Reasoning Pro |
|---|---|---|
| API identifier | gpt-5.2-pro | sonar-reasoning-pro |
| API providers | OpenAI | Not listed |
| Prices checked | Oct 8, 2026 | Oct 8, 2026 |
API identifier
- GPT-5.2 Pro
gpt-5.2-pro- Sonar Reasoning Pro
sonar-reasoning-pro
API providers
- GPT-5.2 Pro
- OpenAI
- Sonar Reasoning Pro
- Not listed
Prices checked
- GPT-5.2 Pro
- Oct 8, 2026
- Sonar Reasoning Pro
- Oct 8, 2026
About the models
GPT-5.2 Pro
GPT-5.2 with extra compute for the most demanding problems. No cached-input discount.
Full pricing & detailsSonar Reasoning Pro
Note: Sonar Pro pricing includes Perplexity search pricing. See [details here](https://docs.perplexity.ai/guides/pricing#detailed-pricing-breakdown-for-sonar-reasoning-pro-and-sonar-pro) Sonar Reasoning Pro is a premier reasoning model powered by DeepSeek R1 with Chain of Thought (CoT). Designed for
Full pricing & detailsComparison FAQ
GPT-5.2 Pro: $21 input and $168 output per million tokens. Sonar Reasoning Pro: $2.00 input and $8.00 output per million tokens. The cheaper choice depends on your input-to-output ratio; a model can have a lower input rate but a higher output rate.