Sonar Reasoning Pro Paid vs 
GPT-5 Nano Paid
Sonar Reasoning Pro vs GPT-5 Nano compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Sonar Reasoning Pro — full profile › · GPT-5 Nano — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$8 /M outputManaged API (no infra to run)
$0.4 /M outputManaged API (no infra to run)
Sonar Reasoning Pro vs GPT-5 Nano specs
| Spec | Sonar Reasoning Pro | GPT-5 Nano | Winner |
|---|---|---|---|
| Maker | Perplexity | OpenAI | – |
| Type | Proprietary | Proprietary | – |
| Context window | 128K tokens | 400K tokens | |
| Input price | $2/M | $0.05/M | |
| Output price | $8/M | $0.4/M | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | No | Yes | |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
GPT-5 Nano is ~20× cheaper than Sonar Reasoning Pro on output tokens ($0.4 vs $8 per M tokens).
- You want frontier performance through a managed API
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You need the longer 400K context window
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | Sonar Reasoning Pro | GPT-5 Nano |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✗ | ✓ |
| 1M+ context window | ✗ | ✗ |
Benchmarks: Sonar Reasoning Pro vs GPT-5 Nano
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Sonar Reasoning Pro and GPT-5 Nano score
| Criterion | Sonar Reasoning Pro | GPT-5 Nano |
|---|---|---|
| Cost-efficiency | 3.5 | 5.0 |
| Context window | 3.5 | 4.5 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 3.5 | 5.0 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
Sonar Reasoning Pro Paid
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 powe
GPT-5 Nano Paid
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Sonar Reasoning Pro vs GPT-5 Nano — which is cheaper?
GPT-5 Nano is cheaper on output ($0.4/M vs $8/M).
Which has the larger context window?
GPT-5 Nano offers the larger context window (400K tokens).
Sonar Reasoning Pro vs GPT-5 Nano — which should I pick in 2026?
Choose GPT-5 Nano for the lower output price ($0.4/M vs $8/M). It also gives you the larger 400K context window.
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