GPT OSS 120BvsGrok 4
GPT OSS 120B is cheaper than Grok 4 at $0.18/M vs $3/M input tokens.
| Spec | GPT OSS 120B | Grok 4 |
|---|---|---|
| Input price | $0.18/M tokens | $3/M tokens |
| Output price | $0.8/M tokens | $15/M tokens |
| Context window | 131K tokens | 256K tokens |
| Parameters | 117B (5.1B active) | Not disclosed |
| Weights | Open | — |
| Free API (OpenRouter) | No | No |
| Released | Aug 2025 | Jul 2025 |
Our Verdict
GPT OSS 120B
Grok 4
Not enough votes to call it. On the specs, nothing separates them.
GPT OSS 120B costs 19x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT OSS 120B
Input
$0.18
17× cheaper
Output
$0.80
19× cheaper
Grok 4
Input
$3.00
Output
$15.00
GPT OSS 120B is cheaper on both: 17× input, 19× output.
Where to run it
19 hosts, cheapest first
GPT OSS 120B19 hosts
AkashMLbf16$0.03 in$0.17 out131k100% upCoreWeavefp4$0.03 in$0.17 out131k100% upDekaLLMbf16$0.03 in$0.18 out131k99.1% upDeepInfrabf16$0.04 in$0.17 out131k99.7% upNovitafp4$0.05 in$0.25 out131k95.5% upDigitalOcean$0.06 in$0.39 out128k100% up
13 more hostsFewer hosts
Mancerfp8$0.06 in$0.50 out131k98% upGoogle Vertex AI$0.09 in$0.36 out131k99.9% upBasetenfp4$0.10 in$0.50 out128k100% upParasailfp4$0.10 in$0.75 out131k100% upSambaNova$0.14 in$0.95 out131k99% upAmazon Bedrock$0.15 in$0.60 out131k100% upGroq$0.15 in$0.60 out131k100% upNebiusfp4$0.15 in$0.60 out131k99.8% upPhala$0.15 in$0.60 out131k96.1% upSiliconFlowfp8$0.15 in$0.60 out131k95.3% upCerebrasfp16$0.35 in$0.75 out131k100% upTogetherdegraded$0.15 in$0.60 out131k97.7% upMaradegraded$0.15 in$0.75 out131k82% up
Grok 4
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
49%
Grok 4 uses 3.9x more emoji
GPT OSS 120B
Grok 4
52%Vocabulary56%
19wSentence Length18w
0.28Hedging0.65
7.4Bold2.4
1.8Lists2.4
0.15Emoji0.60
0.73Headings0.73
0.17Transitions0.06
Based on 21 + 26 text responses
Research
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