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 18 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 (vendor fine-tune API or self-hosted open weights).

Source: OpenAI models, OpenAI pricing, Prompt caching (1,024 minimum, 30m TTL)

Price per 1M tokens
$0.05 in / $0.2 out
Context window131,072
Max output131,072
Batch discount-50%
Input
  • Text
Output
  • Text
Priced across18 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.

PlatformRegionInput / MOutput / MCache read / MBatchAccess
Together AI
-$0.05$0.2-✓Direct
DarkbloomLowest
-$0.018$0.09$0.009-via OpenRouter
Akashml
-$0.02$0.1--via OpenRouter
Coreweave
-$0.03$0.13$0.03-via OpenRouter
Wandb
-$0.03$0.13$0.03-via OpenRouter
Dekallm
-$0.029$0.14--via OpenRouter
DeepInfra
-$0.03$0.14--via OpenRouter
Parasail
-$0.03$0.15$0.02-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
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
Groq
-$0.075$0.3$0.0375-via OpenRouter

Some hosts price by region. Shown rates match the selected region.

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-6.1 Sol
openai/gpt-6.1-sol
$2 / $10 in / out per 1M
GPT-6 Sol
openai/gpt-6-sol
$2 / $10 in / out per 1M
GPT-6 Luna
openai/gpt-6-luna
$0.1 / $0.5 in / out per 1M
GPT-6 Astra
openai/gpt-6-astra
$10 / $50 in / out per 1M
GPT-5.6 Sol
openai/gpt-5.6-sol
$4 / $20 in / out per 1M
GPT-5.6 Terra
openai/gpt-5.6-terra
$2 / $12 in / out per 1M

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Rates are generated from SuperPenguin's live pricing catalog.