I've run into this a ton of times and these websites all kinda suck. Someone mentioned the OpenRouter /models endpoint in a sibling comment here, so I quickly threw this together just now. Please feel free to PR!
https://github.com/tekacs/llm-pricing
llm-pricing
Model | Input | Output | Cache Read | Cache Write
------------------------------------------+-------+--------+------------+------------
anthropic/claude-opus-4 | 15.00 | 75.00 | 1.50 | 18.75
anthropic/claude-sonnet-4 | 3.00 | 15.00 | 0.30 | 3.75
google/gemini-2.5-pro | 1.25 | 10.00 | N/A | N/A
x-ai/grok-4 | 3.00 | 15.00 | 0.75 | N/A
openai/gpt-4o | 2.50 | 10.00 | N/A | N/A
...
--- llm-pricing calc 10000 200 -c 9500 opus-4 4.1
Cost calculation: 10000 input + 200 output (9500 cached, 5m TTL)
Model | Input | Output | Cache Read | Cache Write | Total
---------------------------+-----------+-----------+------------+-------------+----------
anthropic/claude-opus-4 | $0.007500 | $0.015000 | $0.014250 | $0.178125 | $0.214875
openai/gpt-4.1 | $0.001000 | $0.001600 | $0.004750 | $0.000000 | $0.007350
openai/gpt-4.1-mini | $0.000200 | $0.000320 | $0.000950 | $0.000000 | $0.001470
openai/gpt-4.1-nano | $0.000050 | $0.000080 | $0.000237 | $0.000000 | $0.000367
thudm/glm-4.1v-9b-thinking | $0.000018 | $0.000028 | $0.000333 | $0.000000 | $0.000378
--- llm-pricing opus-4 -v
=== ANTHROPIC ===
Model: anthropic/claude-opus-4
Name: Anthropic: Claude Opus 4
Description: Claude Opus 4 is benchmarked as the world's best coding model, at time of release,
bringing sustained performance on complex, long-running tasks and agent workflows. It sets new
benchmarks in software engineering, achieving leading results on SWE-bench (72.5%) and
Terminal-bench (43.2%).
Pricing:
Input: $15.00 per 1M tokens
Output: $75.00 per 1M tokens
Cache Read: $1.50 per 1M tokens
Cache Write: $18.75 per 1M tokens
Per Request: $0
Image: $0.024
Context Length: 200000 tokens
Modality: text+image->text
Tokenizer: Claude
Max Completion Tokens: 32000
Moderated: true
