Aya Expanse vs GPT-5.3 Chat: API Cost Comparison
Compare the API pricing, context windows, features, and real-world cost projections for Aya Expanse (Cohere) and GPT-5.3 Chat (OpenAI). Use the interactive calculator below to compute your exact monthly cost based on your token usage and request volume.
Prices verified Mar 27, 2026
Interactive Cost Calculator
Fills in typical token counts for a workload type
Tokens in each prompt sent to the model
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Total API calls per month
Showing costs for 2 models. Cheapest: Aya Expanse at $12.50/month.
| Alert | |||||||
|---|---|---|---|---|---|---|---|
BestAya Expanse | Cohere | $12.50 | $0.001250 | $5.00 | $7.50 | 85.7% | Alerts coming soon |
GPT-5.3 Chat | OpenAI | $87.50 | $0.008750 | $17.50 | $70.00 | — | Alerts coming soon |
Monthly Cost Comparison
Price Comparison at a Glance
All prices are in USD per 1 million tokens ($/M tokens). Lower is cheaper.
| Pricing Type | Aya Expanse | GPT-5.3 Chat | Cheaper |
|---|---|---|---|
| Input (standard) | $0.50/M | $1.75/M | Aya Expanse |
| Output | $1.50/M | $14.00/M | Aya Expanse |
Prices last verified: 2026-03-06 – 2026-03-27
Cost Breakdown by Usage Volume
Estimated monthly costs at different request volumes, assuming 1,000 input tokens and 500 output tokens per request. Adjust in the calculator above for your specific use case.
| Volume | Aya ExpanseMonthly | GPT-5.3 ChatMonthly | Aya ExpansePer request | GPT-5.3 ChatPer request |
|---|---|---|---|---|
| 1K requests/mo | $1.25 | $8.75 | $0.001250 | $0.008750 |
| 10K requests/mo | $12.50 | $87.50 | $0.001250 | $0.008750 |
| 100K requests/mo | $125.00 | $875.00 | $0.001250 | $0.008750 |
| 1M requests/mo | $1,250.00 | $8,750.00 | $0.001250 | $0.008750 |
Green values indicate the lower-cost option at each volume tier. Cost per request is calculated at 1,000 input + 500 output tokens using standard (non-batch, non-cached) pricing.
Price History
Input price per 1M tokensWhen to Choose Aya Expanse
by Cohere
- Content & copywriting
- General chatbot
- Customer support
Input / 1M tokens
$0.50/M
Output / 1M tokens
$1.50/M
Context window
128,000
Tier
mid
When to Choose GPT-5.3 Chat
by OpenAI
- General chatbot
Input / 1M tokens
$1.75/M
Output / 1M tokens
$14.00/M
Context window
128,000
Tier
mid
Key Differences Beyond Price
Cost is only one factor in choosing an AI model. Context window size, rate limits, supported features, and latency all affect whether a model fits your use case.
| Capability | Aya Expanse | GPT-5.3 Chat |
|---|---|---|
| Context window | 128,000 tokens | 128,000 tokens |
| Max output tokens | 4,096 tokens | 16,384 tokens |
| Performance tier | Mid | Mid |
| Vision / image input | No | No |
| Function calling | No | Yes |
| JSON mode | Yes | Yes |
| Prompt caching | No | No |
| Batch API (50% discount) | No | No |
| Extended reasoning | No | No |
| Fine-tuning | No | No |
Aya Expanse notes
Multilingual model supporting 23 languages. Good for international content.
Frequently Asked Questions
Is Aya Expanse cheaper than GPT-5.3 Chat?
At standard usage (1,000 input tokens, 500 output tokens, 100,000 requests/month), Aya Expanse costs $125.00/month versus $875.00/month for GPT-5.3 Chat — a 86% saving. Your actual savings will vary based on your token profile; output-heavy workloads amplify differences in output pricing.
Which model has a larger context window, Aya Expanse or GPT-5.3 Chat?
Both Aya Expanse and GPT-5.3 Chat have the same context window: 128,000 tokens.
Do Aya Expanse and GPT-5.3 Chat support the Batch API?
Neither Aya Expanse nor GPT-5.3 Chat currently supports a batch API with discounted pricing. For batch-eligible alternatives, consider models from OpenAI, Anthropic, or Google that include batch API support.
Which model offers better prompt caching?
Neither Aya Expanse nor GPT-5.3 Chat currently supports prompt caching. For prompt-caching capable alternatives, consider Claude models from Anthropic or GPT-4o from OpenAI.
What are the best use cases for Aya Expanse vs GPT-5.3 Chat?
Both models are well-suited for General chatbot. Aya Expanse is particularly strong for Content & copywriting, Customer support. GPT-5.3 Chat is favored for similar workflows. At the same quality level, the lower-cost model is usually preferable; use this page's calculator to compare total monthly spend at your volume.
What is the cost per request for Aya Expanse vs GPT-5.3 Chat?
At 1,000 input tokens and 500 output tokens per request — a typical conversational workload — Aya Expanse costs $0.001250 per request and GPT-5.3 Chat costs $0.008750 per request. At 100,000 requests/month, that translates to $125.00 and $875.00 respectively. Use the interactive calculator to adjust these parameters for your actual workload.
Aya Expanse vs GPT-5.3 Chat: Summary
When comparing Aya Expanse and GPT-5.3 Chat for API cost, the right choice depends on your workload's token profile, required features, and tolerance for latency. Aya Expanse offers lower total cost at standard usage volumes (1,000 input + 500 output tokens per request at 100,000 requests/month) at $125.00/month, compared to $875.00/month for GPT-5.3 Chat.
Both models are priced in USD per million tokens, the standard unit across all major AI API providers. Aya Expanse charges $0.50/M for input tokens and $1.50/M for output tokens. GPT-5.3 Chat charges $1.75/M input and $14.00/M output. If your workload is output-heavy (more tokens generated than consumed as input), the model with the lower output price compounds cost savings significantly at scale.
Context window capacity differs between the two: Both models support 128,000 tokens per request. A larger context window is essential for document summarization, large codebase analysis, and multi-document retrieval-augmented generation (RAG) applications.
Use the interactive calculator at the top of this page to enter your actual token usage and monthly request volume for a precise cost comparison tailored to your workload. Adjust for batch API discounts and prompt caching to find the most cost-effective option for your specific deployment.
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