GPT Audio Paid vs 
Solar Pro 4 Paid
GPT Audio vs Solar Pro 4 compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
GPT Audio — full profile › · Solar Pro 4 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$10 /M outputManaged API (no infra to run)
$0.36 /M outputManaged API (no infra to run)
GPT Audio vs Solar Pro 4 specs
| Spec | GPT Audio | Solar Pro 4 | Winner |
|---|---|---|---|
| Maker | OpenAI | Upstage | – |
| Type | Proprietary | Proprietary | – |
| Context window | 128K tokens | 524K tokens | |
| Input price | $2.5/M | $0.09/M | |
| Output price | $10/M | $0.36/M | |
| Vision / multimodal | No | No | – |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
Solar Pro 4 is ~28× cheaper than GPT Audio on output tokens ($0.36 vs $10 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 524K context window
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | GPT Audio | Solar Pro 4 |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✗ | ✗ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✗ | ✗ |
Benchmarks: GPT Audio vs Solar Pro 4
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How GPT Audio and Solar Pro 4 score
| Criterion | GPT Audio | Solar Pro 4 |
|---|---|---|
| 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 | 3.5 |
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
GPT Audio Paid
The gpt-audio model is OpenAI's first generally available audio model. The new snapshot features an upgraded decoder for more natural sounding voices and maintains better voice consistency. Audio is priced...
Solar Pro 4 Paid
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...
Frequently asked questions
GPT Audio vs Solar Pro 4 — which is cheaper?
Solar Pro 4 is cheaper on output ($0.36/M vs $10/M).
Which has the larger context window?
Solar Pro 4 offers the larger context window (524K tokens).
GPT Audio vs Solar Pro 4 — which should I pick in 2026?
Choose Solar Pro 4 for the lower output price ($0.36/M vs $10/M). It also gives you the larger 524K context window.
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