Sonar Reasoning Pro Paid vs 
Seed 1.6 Flash Paid
Sonar Reasoning Pro vs Seed 1.6 Flash compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Sonar Reasoning Pro — full profile › · Seed 1.6 Flash — 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)
$0.3 /M outputManaged API (no infra to run)
Sonar Reasoning Pro vs Seed 1.6 Flash specs
| Spec | Sonar Reasoning Pro | Seed 1.6 Flash | Winner |
|---|---|---|---|
| Maker | Perplexity | ByteDance Seed | – |
| Type | Proprietary | Proprietary | – |
| Context window | 128K tokens | 262K tokens | |
| Input price | $2/M | $0.08/M | |
| Output price | $8/M | $0.3/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
Seed 1.6 Flash is ~27× cheaper than Sonar Reasoning Pro on output tokens ($0.3 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 262K 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 | Seed 1.6 Flash |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✗ | ✓ |
| 1M+ context window | ✗ | ✗ |
Benchmarks: Sonar Reasoning Pro vs Seed 1.6 Flash
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Sonar Reasoning Pro and Seed 1.6 Flash score
| Criterion | Sonar Reasoning Pro | Seed 1.6 Flash |
|---|---|---|
| Cost-efficiency | 3.5 | 5.0 |
| Context window | 3.5 | 4.0 |
| 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
Seed 1.6 Flash Paid
Seed 1.6 Flash is an ultra-fast multimodal deep thinking model by ByteDance Seed, supporting both text and visual understanding. It features a 256k context window and can generate outputs of...
Frequently asked questions
Sonar Reasoning Pro vs Seed 1.6 Flash — which is cheaper?
Seed 1.6 Flash is cheaper on output ($0.3/M vs $8/M).
Which has the larger context window?
Seed 1.6 Flash offers the larger context window (262K tokens).
Sonar Reasoning Pro vs Seed 1.6 Flash — which should I pick in 2026?
Choose Seed 1.6 Flash for the lower output price ($0.3/M vs $8/M). It also gives you the larger 262K context window.
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