LLM cost intelligence
Model choice isa cost decision.
We check list prices against each provider's own pricing page, then show what the same work costs on a comparable model — including the tokenizer differences most price tables ignore.
- Current
- $1,620
- GPT-4o
- Comparable model
- $1,152
- Grok 4.7
Annual difference
$468
−29%
Same text volume: 30M input + 6M output tokens a month, counted in OpenAI tokens. List prices, promotions at their regular rate, tokenizer differences included. Capability is compared on our editorial scores.
DeepSeek V4 Pro
$1.32 / $3.96in / out per 1M
GPT-6.1 Sol
$2.00 / $10.00in / out per 1M
Claude Sonnet 5.5
$2.00 / $10.00in / out per 1M
Gemini 3.1 Pro
$2.00 / $12.00in / out per 1M
- 29
- Current models
- 5
- Providers
- $2.84
- Avg Input / 1M
- 5
- Languages
- Oct 12, 2026
- Prices verified
Just released
New models and their prices
The latest releases, with list prices checked against each provider's own pricing page.
Anthropic · released Oct 7, 2026
Claude Haiku 5.5
$0.10 input · $0.50 output per 1M tokens
Compare with Claude Haiku 4.5OpenAI · released Sep 29, 2026
GPT-6.1 Sol
$2.00 input · $10.00 output per 1M tokens
Compare with GPT-6 SolAnthropic · released Sep 28, 2026
Claude Sonnet 5.5
$2.00 input · $10.00 output per 1M tokens
Compare with Claude Sonnet 5Anthropic · released Sep 22, 2026
Claude Opus 5.5
$4.00 input · $20.00 output per 1M tokens
Compare with Claude Opus 5OpenAI · released Sep 22, 2026
GPT-6 Luna
$0.10 input · $0.50 output per 1M tokens
Compare with GPT-5.6 LunaOpenAI · released Sep 22, 2026
GPT-6 Sol
$2.00 input · $10.00 output per 1M tokens
Comparisons
Compare AI model costs
Find the cheapest model for your use case
Compare any two models
Pick two models for a full cost and capability breakdown.
- Claude Opus 5.5 vs GPT-6 Astra
- Claude Sonnet 5.5 vs GPT-6.1 Sol
- Gemini 3.1 Pro vs GPT-6.1 Sol
- Claude Sonnet 5 vs Claude Sonnet 5.5
- Claude Opus 5 vs Claude Opus 5.5
- GPT-5.6 Sol vs GPT-6 Astra
- Gemini 3.8 Flash vs GPT-6 Luna
- Claude Haiku 4.5 vs GPT-6 Luna
- DeepSeek V4 Pro vs GPT-6.1 Sol
- GPT-6.1 Sol vs Grok 4.7
- Claude 3 Opus vs Claude Opus 5.5
- Claude 3.5 Sonnet vs Claude Sonnet 5.5
Tools
Everything you need
- Model CompareSide-by-side price and benchmark comparison across all major AI models.
- AI LeaderboardModels ranked by value, speed, coding, reasoning, creative, and vision.
- Token CounterCount tokens with the tokenizer current OpenAI models use, and see what the text costs on every current model.
- Prompt CompressorOptimize prompts and system instructions to reduce token size and cost instantly.
- Savings CalculatorCalculate how much you could save by switching AI providers.
- Hype TrackerWhich AI is trending on HackerNews this week? Real data, updated hourly.
- AI Glossary50+ AI and LLM terms explained clearly. Your reference for AI terminology.
- Use Case Library30 AI use cases with model recommendations, cost estimates, and tips.
- AI vs HumanIs it cheaper to hire a human or use AI? Calculate by role and region.
Real savings
See how much you could save
Pick a real use case. See what you're paying now — and what you could pay instead.
Monthly volume: 500K tokens/month · e.g.: ~500 chat sessions
Most people use
$2.75/ month
GPT-4o
OpenAI
$44.40 / year
Comparable model
$1.80/ month
Grok 4.7
xAI
$21.60 / year
Your monthly saving
$0.95/ month−35%
= $11.40 saved per year
About this site
What is iOPTERA?
There are dozens of AI tools — ChatGPT, Claude, Gemini, and many more. They all do similar things, but their prices can differ by up to 100x. Most people just pay whatever the popular option costs without knowing there's a better deal.
iOPTERA compares all of them in one place — prices, quality, speed — so you can pick the right AI for your job and stop overpaying. Free, no sign-up needed.
Start comparing- 29Compare 29 current modelsSide-by-side price, context and capability for every major lab's current line-up.
- 100×Up to 100× price gapBetween the cheapest and the most expensive current model, per token. Which one fits depends on the task.
- $0Free, no sign-upNo account needed. Just open the site and start comparing.
Frequently asked questions
What exactly is iOPTERA?
iOPTERA compares what large language models actually cost to use: list prices checked against each provider's pricing page, the extra tokens some tokenizers produce, and what a switch between models would save.
Is my data uploaded to your servers?
No. Usage files you load into the cost auditor are read and analysed in your browser and never uploaded. The prompt compressor is different: its advanced mode sends the text you paste to our server to process it, and does not store it.
How can switching models reduce costs?
Mostly by not paying frontier prices for easy requests: routing simple traffic to cheaper models, caching repeated context, and batching work that can wait. How much that saves depends entirely on your traffic — the auditor estimates it from your own usage.
Which models are supported?
Current models from OpenAI, Anthropic, Google, xAI and DeepSeek, plus Meta's Llama. Retired models keep their pages, which say when they were shut down and what replaced them.
Is this a paid service?
Yes, it is free to use — no account and no paid tier.
Why do costs here differ from per-token price tables?
Because providers' tokenizers split the same text into different numbers of tokens. We count text the same way for every model and charge each model for the tokens its own tokenizer would produce. The methodology page explains how.
Can I use it for enterprise-scale audits?
Yes. The auditor reads usage exports with millions of tokens and estimates what the same traffic would cost on current models. Large files are processed in your browser and may take a few seconds.
Does it support Batch API pricing?
Yes. Where a provider offers a batch discount — often 50% for requests that can wait — model pages show the batch price and the auditor takes it into account.