OpenAI: gpt-oss-20b (free), OpenAI — route, pricing & source
gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...
OpenRoutermediumLast checked: May 14, 2026
Input
$0.00 / 1M
/ 1M tokens
Output
$0.00 / 1M
/ 1M tokens
Cached input
Not available
Not available
Cache write
Not available
Not available
Context and limits
Context window
131.1K
Max output
8,192
Input modalities
text
Output modalities
text
Weight access
Unknown
Availability
Unknown
Capability flags
ToolsReasoningLong context
From source metadata + verification fields — confirm provider docs before production.
Benchmarks
No safely merged benchmark result for this model yet.
Access and license
Official API
No
Open weights
No
Self-hostable
No
License
Unknown
Example costs
Scenario: 1K input + 300 output tokens / request
10,000 requests
$0.00
100,000 requests
$0.00
1,000,000 requests
$0.00
Cheaper alternatives
Lower-cost models for the same scenario
No cheaper alternative for this scenario.
