GPT OSS 20B
vertex The API that serves this model and sets the prices shown here. gpt-oss-20b-maas The model identifier to send in API requests. LLM Generates text from a prompt, so it can be compared with other LLMs on price and capability. Small The fast, low-latency tier of a model family, suited to high-volume or simple tasks. Retired Aug 13, 2026 This model has been retired and can no longer be relied on.Provider: openai · served via Vertex
Listed as deprecated on models.dev as of 2026-08-13.
Sticker prices & cost-per-token
List rates as published by Vertex, before any volume or enterprise discounts.
$0.07
$0.25
131,072 tokens
32,768
tokens per response (includes reasoning tokens)
Open weights (permissive license)
Apache-2.0
Get this data free
Want to stay updated on price changes on this model? Pull this data free (no API key required) here:
curl "https://coolhandlabs.com/api/v2/inference_apis?q%5Bmodel_eq%5D=gpt-oss-20b-maas&q%5Bsource_api_eq%5D=vertex"Pricing History
| Effective | Price |
|---|---|
| Aug 16, 2026 – present | Input cost: $0.07 / 1M, Output cost: $0.25 / 1M, Cached input cost: $0.00 / 1M, Cache creation cost: $0.00 / 1M, 5-minute cache write cost: $0.00 / 1M, 1-hour cache write cost: $0.00 / 1M, Reasoning output cost: $0.00 / 1M, Cache storage cost: $0.00 / 1M/hr |
History
No automated scan changes recorded yet.
| Date | Changed by | What changed |
|---|---|---|
| Aug 16, 2026 | Unknown | Initial record created |
Source
https://models.dev/api.json (models.dev provider 'google-vertex', bulk import 2026-08-13)Comparable models
No comparable models identified yet.
Reliability
No reliability incidents recorded in the last 90 days.
Frequently asked questions
GPT OSS 20B (openai via Vertex) costs $0.07 per 1M input tokens and $0.25 per 1M output tokens, as last published by Vertex.
GPT OSS 20B has a context window of 131,072 tokens (the maximum combined input and output it can handle in a single request).
GPT OSS 20B sits in the small size tier. Size tiers run from micro (small enough to run on a device) through small, medium and large to extra large (frontier flagships), and are assigned from the model's family, naming and limits rather than its price.
GPT OSS 20B can generate up to 32,768 tokens in a single response. Reasoning (thinking) tokens count toward this limit.
GPT OSS 20B accepts text as input and produces text as output, as recorded in the Coolhand catalog.
Yes — the weights of GPT OSS 20B can be downloaded under the Apache-2.0 license. Check the license terms for any limits on commercial use.
Yes — openai deprecated GPT OSS 20B on August 13, 2026. Listed as deprecated on models.dev as of 2026-08-13.
openai retired GPT OSS 20B on August 13, 2026.
Since GPT OSS 20B is deprecated, openai customers are moving to GPT-4, GPT-Image-2, and o1 Mini.
Call GET https://coolhandlabs.com/api/v2/inference_apis?q[source_api_eq]=vertex&q[model_eq]=gpt-oss-20b-maas — free, no API key required, and scoped to just this model since source_api and model together are unique. See https://coolhandlabs.com/docs for the full REST API reference.
Coolhand also tracks GPT-4, GPT-3.5 Turbo 0125, GPT-3.5 Turbo 1106, GPT-3.5 Turbo Instruct, GPT-4 Turbo Vision, and GPT-4 from openai. Some may already be deprecated, so check each model's status alongside its current pricing.
| Model | Input cost | Output cost | Context window | Max output tokens | Status |
|---|---|---|---|---|---|
| GPT-4 | $30.00/1M $0.0000300000 | $60.00/1M $0.0000600000 | 8,192 | 8,192 |
Deprecated Oct 23, 2026
|
| GPT-3.5 Turbo 0125 via Azure | $0.50/1M $0.0000005000 | $1.50/1M $0.0000015000 | 16,384 | 16,384 |
Deprecated Aug 13, 2026
|
| GPT-3.5 Turbo 1106 via Azure | $1.00/1M $0.0000010000 | $2.00/1M $0.0000020000 | 16,384 | 16,384 |
Deprecated Aug 13, 2026
|
| GPT-3.5 Turbo Instruct via Azure | $1.50/1M $0.0000015000 | $2.00/1M $0.0000020000 | 4,096 | 4,096 |
Deprecated Aug 13, 2026
|
| GPT-4 Turbo Vision via Azure | $10.00/1M $0.0000100000 | $30.00/1M $0.0000300000 | 128,000 | 4,096 |
Deprecated Aug 13, 2026
|
| GPT-4 via Azure | $30.00/1M $0.0000300000 | $60.00/1M $0.0000600000 | — | — | Active |
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