OpenAI

GPT Oss 120b API Pricing

GPT Oss 120b has tracked API rates of $0.15 per 1M input tokens and $0.595 per 1M output tokens. Cached input is billed at $0.125 per 1M tokens. Rates are in USD from the AI IQ dataset; see the GPT Oss 120b model profile for capability scores.

Input / 1M
$0.15
Output / 1M
$0.595
Effective / 1M I/O
$0.6934
Cost Rank
#30

Price List

RatePrice (USD)Notes
Input$0.15per 1M tokens
Output$0.595per 1M tokens
Cached input (read)$0.125per 1M tokens
Blended input + output$0.7451M in + 1M out at list price
Context window131K tokens

Pricing References and Billing Caveats

These are the tracked rates, not a live quote. Hosted-provider choice, region, long-context tiers, caching, batch discounts, and temporary promotions can change the actual bill. Open-weight availability does not mean hosted inference is free. Workload examples assume the listed standard input and output rates, with no cache hits or discounts.

OpenAI pricing catalog — check current offerings and rate tiers. This catalog may not list historical models or third-party hosted endpoints.

No model-specific official reference is recorded for this entry. Confirm the current rates directly with your inference provider.

What a Workload Costs

Computed straight from the list prices above — token counts are illustrative workload sizes, not measurements of GPT Oss 120b.

WorkloadCostTokens
Short chat turn$0.000451K in / 500 out
Summarize a long document$0.016100K in / 2K out
Agentic coding session$0.135500K in / 100K out
1M input + 1M output tokens$0.7451M in / 1M out

Effective Cost

In AI IQ's scoring, GPT Oss 120b's list price is adjusted by a token-usage multiplier of 0.931 (measured from real benchmark runs), giving an effective cost of $0.6934 per 1M input + output tokens. That places it #30 of 153 models on the effective-cost ranking (lower is cheaper). Some models spend far more tokens than others on the same task, so effective cost compares what a unit of work really costs. Method details are on the methodology page; see all models on the cost charts and the falling cost of intelligence over time.

Cheaper Alternatives at Similar Capability

Models with a lower effective cost that score within a few IQ points of GPT Oss 120b (IQ 98), or better.

ModelProviderIQEffective Cost / 1M
mimo-v2.6-flashXiaomi122$0.6897
mimo-v2.5-proXiaomi115$0.6471
mimo-v2.5Xiaomi108$0.2427
Muse GlimmerMeta106$0.5627
Ling 3.0 FlashChina (Other)105$0.3439
gemini-3.1-flash-liteGoogle104$0.4294

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