GPT-6 Astra Pro Paid vs GPT-3.5 Turbo (older v0613) Paid
GPT-6 Astra Pro vs GPT-3.5 Turbo (older v0613) compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
GPT-6 Astra Pro — full profile › · GPT-3.5 Turbo (older v0613) — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$50 /M outputManaged API (no infra to run)
$2 /M outputManaged API (no infra to run)
GPT-6 Astra Pro vs GPT-3.5 Turbo (older v0613) specs
| Spec | GPT-6 Astra Pro | GPT-3.5 Turbo (older v0613) | Winner |
|---|---|---|---|
| Maker | OpenAI | OpenAI | – |
| Type | Proprietary | Proprietary | – |
| Context window | 1.1M tokens | 4K tokens | |
| Input price | $10/M | $1/M | |
| Output price | $50/M | $2/M | |
| Vision / multimodal | Yes | No | |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
GPT-3.5 Turbo (older v0613) is ~25× cheaper than GPT-6 Astra Pro on output tokens ($2 vs $50 per M tokens).
- You want frontier performance through a managed API
- You need the longer 1.1M context window
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | GPT-6 Astra Pro | GPT-3.5 Turbo (older v0613) |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✗ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✗ |
Benchmarks: GPT-6 Astra Pro vs GPT-3.5 Turbo (older v0613)
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How GPT-6 Astra Pro and GPT-3.5 Turbo (older v0613) score
| Criterion | GPT-6 Astra Pro | GPT-3.5 Turbo (older v0613) |
|---|---|---|
| Cost-efficiency | 2.0 | 4.5 |
| Context window | 5.0 | 2.0 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 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-6 Astra Pro Paid
GPT-6 Astra Pro is the same underlying model as [GPT-6 Astra](https://openrouter.ai/openai/gpt-6-astra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://develope
GPT-3.5 Turbo (older v0613) Paid
GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021.
Frequently asked questions
GPT-6 Astra Pro vs GPT-3.5 Turbo (older v0613) — which is cheaper?
GPT-3.5 Turbo (older v0613) is cheaper on output ($2/M vs $50/M).
Which has the larger context window?
GPT-6 Astra Pro offers the larger context window (1.1M tokens).
GPT-6 Astra Pro vs GPT-3.5 Turbo (older v0613) — which should I pick in 2026?
Choose GPT-3.5 Turbo (older v0613) for the lower output price ($2/M vs $50/M). Choose GPT-6 Astra Pro if you need the larger 1.1M context window.
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