OpenAI vs Google Vertex AI Pricing
Per-million-token pricing for OpenAI and Google Vertex AI, with side-by-side flagship models, cheapest tiers, and context windows. Pricing data syncs weekly from a continuously-updated model catalog — last updated June 22, 2026.
As of June 22, 2026, Google Vertex AI offers the lowest output-token price at $0.04/1M (Gemma 3n 4B — $0.04/1M output).
Who wins on what
Cheapest input tokens
$0.02/1MGoogle Vertex AI
Gemma 3 4B — $0.02/1M input
Cheapest output tokens
$0.04/1MGoogle Vertex AI
Gemma 3n 4B — $0.04/1M output
Longest context window
2.0MOpenAI
gpt-5.4 (>272K context length) — 2.0M input tokens
Lowest average output cost
$8.73/1MGoogle Vertex AI
Provider-wide average across 50 models
Largest model catalog
138 modelsOpenAI
More options to match cost vs capability
Cheapest cached input
$0.03/1MGoogle Vertex AI
Gemini 3.1 Flash Lite — $0.03/1M cached read
Most reasoning models
11 modelsGoogle Vertex AI
Models with dedicated reasoning / thinking support
Most vision models
11 modelsGoogle Vertex AI
Models that accept image input
Side-by-side
OpenAI
Cheapest input
$0.030
gpt-oss-20b
Cheapest output
$0.140
gpt-oss-20b
Longest context
2.0M
gpt-5.4 (>272K context length)
Avg output / 1M
$28.00
Across catalog
Cheapest cached input
$0.125
GPT-5.1 Codex Max
| Model | In/1M | Out/1M | Ctx |
|---|---|---|---|
| GPT-5.5 Pro VisionReasoningTools | $30.00 | $180.00 | 1.1M |
| GPT-5.5 VisionReasoningToolsCache | $5.00 | $30.00 | 1.1M |
| gpt-5.4-mini | $0.750 | $4.50 | 272K |
| gpt-5.4-nano | $0.200 | $1.25 | 272K |
| GPT-5.4 Pro VisionReasoningTools | $30.00 | $180.00 | 1.1M |
| gpt-oss-20b | $0.030 | $0.140 | 131K |
Google Vertex AI
Cheapest input
$0.017
Gemma 3 4B
Cheapest output
$0.040
Gemma 3n 4B
Longest context
2.0M
Gemini 3/3.1 (> 200k context)
Avg output / 1M
$8.73
Across catalog
Cheapest cached input
$0.025
Gemini 3.1 Flash Lite
| Model | In/1M | Out/1M | Ctx |
|---|---|---|---|
| Gemini 3.5 Flash VisionReasoningToolsCache | $1.50 | $9.00 | 1.0M |
| Gemini 3.1 Flash Lite VisionReasoningToolsCache | $0.250 | $1.50 | 1.0M |
| Gemini 3.1 Flash Lite Preview VisionReasoningToolsCache | $0.250 | $1.50 | 1.0M |
| Nano Banana 2 VisionReasoning | $0.500 | $60.00 | 66K |
| Gemini 3.1 Pro Preview VisionReasoningToolsCache | $2.00 | $12.00 | 1.0M |
| Gemma 3n 4B | $0.020 | $0.040 | 33K |
All prices in USD per 1 million tokens. Showing top 6 models per provider, sorted by output cost.
Related comparisons
Run the numbers for your workload
Calcaas multiplies per-token costs by your real usage patterns — inputs, outputs, retries, and conversation history — across both providers in one model.