OpenAI

gpt-oss-20b

OpenAI's smaller open-weight reasoning model for local and low-cost deployment, available across inference gateways.

ActiveReleased August 5, 2025Knowledge cutoff June 1, 2024Available from 16 providers
Tool callingCan invoke external tools and APIs (function calling) mid-response.Structured outputCan return JSON or schema-constrained responses instead of free text.ReasoningUses extended thinking / chain-of-thought for harder multi-step problems.Effort controlLets you dial thinking depth (low / medium / high) to trade cost for quality.Fine-tuningSupports training a custom variant on your own data.

Source: OpenAI models, OpenAI pricing

Price per 1M tokens
$0.05 in / $0.2 out
Context window131,072
Max output131,072
Batch discount-50%
ModalitiesText → Text
Priced across16 providers

Pricing

Every billing leg from the live catalog, in USD per 1M tokens.

Billing legRateBatch
Input$0.05 / M$0.025 / M
Output$0.2 / M$0.1 / M

Cost calculator

Billing-grade math over the rate card above, including the thinking tokens most estimates miss.

Hidden reasoning tokens bill as output. 1.0x = thinking off. Medium-effort reasoning typically lands near 3x; heavy reasoning runs 6x to 8x. Set it to match your workload.

Estimated monthly cost
$22.00
at current list prices
Fresh input$10.00
Output incl. thinking$12.00
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Compare providers

The same model, priced across every platform that serves it. Lowest combined in/out rate is flagged.

PlatformInput / MOutput / MCache read / MBatchAccess
Together AI
$0.05$0.2—✓Direct
WandbLowest
$0.03$0.13$0.03—via OpenRouter
Dekallm
$0.029$0.14——via OpenRouter
DeepInfra
$0.03$0.14——via OpenRouter
Novita
$0.04$0.15——via OpenRouter
Phala
$0.04$0.15——via OpenRouter
AWS Bedrock
$0.07$0.15——via OpenRouter
SiliconFlow
$0.04$0.18——via OpenRouter
Parasail
$0.04$0.2$0.02—via OpenRouter
Together AI
$0.05$0.2——via OpenRouter
Google
$0.07$0.25——via OpenRouter
AWS Bedrock
$0.07$0.3—✓Direct
Fireworks AI
$0.07$0.3$0.035✓Direct
Fireworks AI
$0.07$0.3$0.035—via OpenRouter
AWS Bedrock · Regional
from$0.07$0.3—✓Direct
Groq
$0.075$0.3$0.0375—via OpenRouter

Regional deployments are priced per region; the lowest available region rate is shown.

Price history

Has this model gotten cheaper or more expensive?

No changePriced at $0.05 / $0.2 per 1M since May 21, 2026.

More from OpenAI

Other models from the same provider.

GPT-5.6 Sol
openai/gpt-5.6-sol
$5 / $30 in / out per 1M
GPT-5.6 Terra
openai/gpt-5.6-terra
$2.5 / $15 in / out per 1M
GPT-5.6 Luna
openai/gpt-5.6-luna
$1 / $6 in / out per 1M
GPT-5.5
openai/gpt-5.5
$5 / $30 in / out per 1M
GPT-5.5 Pro
openai/gpt-5.5-pro
$30 / $180 in / out per 1M
GPT-5.4
openai/gpt-5.4
$2.5 / $15 in / out per 1M

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Rates are generated from SuperPenguin's live pricing catalog.