Provider · 2026-09-28
opper
| Model | Input / 1M | Output / 1M | Context | Providers | Tags |
|---|---|---|---|---|---|
| GPT OSS 20B | $0.116 | $0.488 | 128K | 1 | tools · json · reasoning · open-weights |
| Muse Spark 1.3 | $1.25 | $4.25 | 1.05M | 1 | tools · json · reasoning · vision |
| Muse Spark 1.2 | $1.25 | $4.25 | 1.05M | 1 | tools · json · reasoning · vision |
| GPT OSS 120B | $1.16 | $4.88 | 128K | 1 | tools · json · reasoning · open-weights |
Frequently asked questions
How many AI models does opper offer?
We track 4 canonical opper models. The list is recomputed daily.
Which opper model is the cheapest?
GPT OSS 20B is currently the lowest-priced opper model, at $0.116 per 1M input tokens and $0.488 per 1M output tokens. For the full apples-to-apples list, see /pricing/cheapest-llm-api.
Which opper model has the largest context window?
Muse Spark 1.3 leads at 1.05M tokens. This is the total of prompt + completion.
Which opper models support tool calling?
Multiple opper models support tool calling, with GPT OSS 20B being a popular pick. The capability column in the table above marks every model with opper tool-calling support.
Which opper models accept image input?
Muse Spark 1.3 accepts image input. Other vision-capable opper models are tagged 'vision' in the table above. See /capabilities/vision for a cross-vendor comparison.
What are the best alternatives to opper?
Depends on the use case. For raw cost savings, look at /pricing/cheapest-llm-api. For agent-oriented workloads, /best/best-ai-model-for-agents. For long-document workflows, /best/best-long-context-llm.
How fresh is this opper pricing data?
Daily. Our pipeline syncs every morning and rebuilds these pages on data change, so list-price moves and new model releases land within roughly 24 hours.
Explore more
Top opper models
- GPT OSS 20B$0.12 in / $0.49 out
- Muse Spark 1.3$1.25 in / $4.25 out
- Muse Spark 1.2$1.25 in / $4.25 out
- GPT OSS 120B$1.16 in / $4.88 out
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Last updated:
Prices in USD per 1M tokens. Unknown means the provider does not publish per-token pricing.
Pricing and capabilities are refreshed daily and reconciled against each provider's official documentation. Always verify critical production decisions with the provider directly.