GPT OSS 120B

OpenAI's open-weight 120B model for production and high reasoning use cases.

Input price: $0.15–$0.385
Output price: $0.60–$0.825
Context: 128K
Max output: 16K
Modalities: InputTextOutputText
Capability: 140 (#70 of 89)
Human preference: 1365
30-day uptime: —
Released: 2025-08-30
Knowledge cutoff: —

Providers

Providers that serve this model. With Auto, each request goes to the best available provider. Prices in USD per 1M tokens; stats cover the last 30 days.

AutoInput$0.15–$0.385Output$0.60–$0.825Cache read$0.015–$0.0825Context128KMax output16KWe send each request to the best-priced healthy provider. You pay that provider’s price.Fireworks AICheapestInput$0.15Output$0.60Cache read$0.015Context131KMax output33KUnited StatesNo trainingNo retentionGroqInput$0.165Output$0.66Cache read$0.0825Context131KMax output66KUnited StatesNo trainingNo retentionTogether AIInput$0.165Output$0.66Cache read—Context131KUnited StatesNo trainingNo retentionAmazon BedrockInput$0.165Output$0.66Cache read—Context128KMax output16KUnited StatesNo trainingNo retentionCerebrasInput$0.385Output$0.825Cache read—Context131KMax output41KUnited Statesfp16No trainingNo retention

Pricing

Prices vary by provider. Showing Fireworks AI, the lowest. Pick a provider above to see its prices.

Input: $0.15; per 1M tokens
Output: $0.60; per 1M tokens
Cache read: $0.015; per 1M tokens

Make a request

Set your provider preferences, then copy the request. It reads your API key from OHMYGPT_API_KEY.

Keep conversations on one provider

Later turns reuse the provider’s prompt cache, which can lower cost and latency.

Providers

Cerebras

Fireworks AI

Groq

Together AI

Amazon Bedrock

curl https://api.ohmygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $OHMYGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-oss-120b",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

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This model

Capability scores are from Epoch AI’s Epoch Capabilities Index (CC BY 4.0, as of 2026-11-02), which combines dozens of benchmarks with GPT-5 set at 150. epoch.ai/eci

Price: our current input price per 1M tokens in USD, lowest across channels. Dated snapshots and resold copies of the same model are merged into one point; free models are not shown.

Shaded area: capability above and price below the median of all models. Pareto frontier: no other model is both cheaper and more capable.

GPT OSS 120BThis model

Capability: 140
Input: $0.15–$0.385
Output: $0.60–$0.825

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Output: $1.54

Tencent Hy3

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MiniMax M3.1 Flash

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Human preference ratings are from the LMArena Text Arena (CC BY 4.0, as of 2026-10-28): Elo ratings from blind votes, on a different scale from capability scores. lmarena.ai/leaderboard/text