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Favicon for openai

OpenAI: gpt-oss-120b

openai/gpt-oss-120b

Model weights
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gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool use, including function calling, browsing, and structured output generation.

Modalities

In / Out Price

$0.03 / $0.17per 1M

Context

131K

Released

Aug 5, 2025

Knowledge Cutoff

Jun 2024

Compare
ProvidersPricingPerformanceUptimeBenchmarksAppsActivityFAQ

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Exacto (highest tool-calling accuracy).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations. Higher percentages are better — and rank percentile shows where this model lands among all models on OpenRouter.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

Quick Start

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

Frequently asked questions

$0.03$0.17$0.030.54s26 tps
97.77%
$0.037$0.17--0.32s63 tps
97.66%
$0.05$0.25--0.46s67 tps
98.66%
$0.055$0.385$0.020.49s38 tps
99.85%
$0.085$0.50--0.64s63 tps
99.25%
$0.10$0.50$0.100.20s315 tps
98.95%
$0.10$0.75$0.0550.32s120 tps
99.97%
$0.14$0.95--0.93s297 tps
89.78%
$0.15$0.60--0.44s323 tps
99.88%
$0.15$0.60--0.51s135 tps
98.88%
$0.15$0.60--0.27s85 tps
96.47%
$0.15$0.60--0.34s256 tps
98.92%
$0.15$0.60------
--
$0.15$0.60--0.65s83 tps
99.98%
$0.15$0.60$0.0750.25s354 tps
99.92%
$0.15$0.75--2.04s202 tps
99.45%
$0.35$0.75$0.350.21s820 tps
99.99%
$0.037$0.49--0.96s71 tps
96.45%
$0.05$0.45--1.38s12 tps
90.21%
$0.09$0.36--2.94s24 tps
89.00%

Throughput

820tok/s

P50, best across providers

Latency

0.20s

P50, best provider

AutoExacto Benchmarks
GPQA DiamondTAU-Bench
Amazon Bedrock (EU)
75.8%--
DekaLLM
75.2%--
Amazon Bedrock
75.1%--
Parasail
76.8%68.3%
Phala
71.6%--
Baseten
77.0%66.1%
+16 more providers
Uptime (3d)

100.00%

Availability (3d)

99.60%

Availability over the last 3 days

Last 72 hours
Availability 99.60%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.70%
Without Routing
86.86%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

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