# Grok 4.3 vs OpenAI GPT-OSS 20B

Grok 4.3 is not currently in the Allocate serving catalog, so this page lists no prices for it: every price on this site comes from the live catalog.

## Specifications

| | Grok 4.3 | OpenAI GPT-OSS 20B |
| --- | --- | --- |
| Lab | xAI | OpenAI |
| Access | Not served on Allocate | Open weights |
| Context window | n/a | 128K tokens |
| List price, input | Not served | $0.05 / M tokens |
| List price, output | Not served | $0.20 / M tokens |
| Cached input | n/a | n/a |
| License | Proprietary API | Apache 2.0 |
| Fine-tunable | No | Yes |

Specifications and provider list prices from the Allocate catalog, checked 2026-07-08. Billed price is list plus the 7% transaction fee.

## Choose Grok 4.3 for

- Freshness-sensitive answers
- Fast reasoning turns
- Research assistants

## Choose OpenAI GPT-OSS 20B for

- Open weights you can fine-tune and own
- Fine-tuning under a permissive license (Apache 2.0)

## Common questions

### Which has the bigger context window?

OpenAI GPT-OSS 20B: 131,072 tokens (128K) against an unlisted window for Grok 4.3.

### Can I fine-tune Grok 4.3 or OpenAI GPT-OSS 20B?

OpenAI GPT-OSS 20B publishes open weights (Apache 2.0) and can be fine-tuned on your own data. Grok 4.3 is a closed model served over API; its weights are not available.

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[HTML page](https://allocate.network/compare/grok-4-3-vs-openai-gpt-oss-20b) · [Grok 4.3](https://allocate.network/models/grok-4-3.md) · [OpenAI GPT-OSS 20B](https://allocate.network/models/openai-gpt-oss-20b.md) · [Machine-readable catalog](https://allocate.network/catalog.json)