Home / All model prices / OpenAI / gpt-oss-20b O OpenAI
gpt-oss-20b OpenRouter price Model overview 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...
Context window 131,072 tokens
Knowledge cutoff —
Price last verified 2026-09-06
First observed 2026-08-11 Descriptions, capabilities, and tariffs come from the linked source. First-party prices take priority; OpenRouter fallbacks are labelled.
Current price Estimated API value in USD per million tokens, backed by OpenRouter's public Models API.
Input $0.03
Cached input $0.03
Cache write 5m —
Cache write 1h —
Output $0.13 Capabilities and formats text frequency penalty include reasoning logit bias logprobs max tokens min p presence penalty reasoning reasoning effort repetition penalty response format seed stop structured outputs temperature tool choice tools top k top logprobs top p Performance references No comparable benchmark data is currently available.
PRICE EVOLUTION Price history Original observation and every later change, including any change of price source.
Original observed price Official price unavailable 2026-08-11
Input: — Cached input: — Cache write 5m: — Cache write 1h: — Output: —
Price change OpenRouter price 2026-08-20
Input: $0.03 Cached input: $0.03 Cache write 5m: — Cache write 1h: — Output: $0.13
