Source-tracked model comparison

GPT-OSS 120B on Groq vs DeepSeek V4 Pro: which has lower coding API cost?

Compare verified pricing and model limits for developer-assistant API cost across GroqCloud and DeepSeek. The cost example uses a developer assistant backend workload and does not assume equal model quality.

Direct cost answer: GPT-OSS 120B on Groq is estimated at $78.75 per month and deepseek-v4-pro at $152.43 for 5,000 input tokens, 1,500 output tokens, and 50,000 monthly requests. GPT-OSS 120B on Groq is $73.68 lower under these assumptions. This does not identify a quality winner.
Current provider alternativesDeveloper assistant backendSources checked 2026-07-15 / 2026-07-12
Pair-specific guidance

Compare completed coding tasks, not list price alone

The tracked token rates and limits provide a cost baseline across two API providers. They do not establish equal coding quality, latency, retry rates, or tool behavior.

Decision factorGPT-OSS 120B on Groqdeepseek-v4-pro
API access providerGroqCloudDeepSeek
Tracked context131,072 tokens1,000,000 tokens
Input price$0.15 per million tokens$0.435 per million tokens
Output price$0.60 per million tokens$0.87 per million tokens
StackLens assessment

Rollout checks for this pair

  • Replay the same repository tasks and count accepted completions, retries, and output tokens.
  • Include provider migration and observability work in the rollout decision.
  • Keep a fallback path until production error and rate-limit behavior is measured.
Tracked facts

Pricing and model limits

Prices are USD per 1M tokens under each model's verified default profile.

FieldGPT-OSS 120B on Groqdeepseek-v4-pro
API access providerGroqCloudDeepSeek
Model creatorOpenAIDeepSeek
API model IDopenai/gpt-oss-120bdeepseek-v4-pro
Input / 1M$0.15$0.435
Cached input / 1M$0.075$0.0036
Output / 1M$0.60$0.87
Context window131,072 tokens1,000,000 tokens
Maximum output65,536 tokens384,000 tokens
Accepted inputtexttext
Example workload

Developer assistant backend cost scenario

5,000 input and 1,500 output tokens per request, 50,000 monthly requests, and 20% cached input.

Groq

GPT-OSS 120B on Groq

$78.75 / month
Input cost
$33.75
Output cost
$45.00
Per 1,000 calls
$1.575
Pricing profile
standard
View model details
DeepSeek

deepseek-v4-pro

$152.43 / month
Input cost
$87.18
Output cost
$65.25
Per 1,000 calls
$3.0486
Pricing profile
standard / cache miss
View model details

Cost result: GPT-OSS 120B on Groq is $73.68 lower per month for these assumptions. This is a price comparison, not a model-quality ranking.

StackLens assessment

Questions to answer before choosing

  • Which model completes the team's representative coding tasks with fewer retries?
  • Do the tracked context and maximum-output limits fit repository-sized prompts?
  • How much switching work is required for SDK, monitoring, and provider controls?
Workload caveat

What this estimate leaves out

The calculation does not compare coding quality and excludes indexing, execution sandboxes, and repository storage.

Latency, reliability, output quality, retries, regional processing, and provider-specific tool charges can change the practical decision.