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Anthropic: Claude Opus 5 vs OpenAI: GPT-5 Nano

On input price, OpenAI: GPT-5 Nano is ~100.0× cheaper. Verified 2026-10-21.

Anthropic: Claude Opus 5 $5.00/$25.00vsOpenAI: GPT-5 Nano $0.050/$0.400

Verdict

On blended price (3:1 input:output), OpenAI: GPT-5 Nano is ~72.7× cheaper ($0.050/$0.400 vs $5.00/$25.00 per 1M tokens).

Pricing

Per-million-token list prices, verified 2026-10-21. Green marks the better value.

MetricAnthropic: Claude Opus 5OpenAI: GPT-5 Nano
Input / 1M$5.00$0.050
Output / 1M$25.00$0.400
Cache read / 1M$0.500$0.0050
Blended (3:1)$10.00/1M$0.138/1M
Estimated monthly costAnthropic: Claude Opus 5OpenAI: GPT-5 Nano
Chatbot10,000 reqs · 800/400 tok$140.00$2.00
Coding agent5,000 reqs · 8000/2000 tok$450.00$6.00
RAG pipeline30,000 reqs · 4000/500 tok$975.00$12.00

Plug in your own numbers in the calculator, or paste a real bill into the Bill Shredder.

Specifications & capabilities

MetricAnthropic: Claude Opus 5OpenAI: GPT-5 Nano
Context window1M400K
Max output128K128K
Vision input✓✓
Tool calling✓✓
Reasoning✓✓

Quality

Intelligence Index by Artificial Analysis (independent evaluations, 0–100).

Verified intelligence scores aren't available for both models yet. See the full leaderboard.

Performance

Measured by Artificial Analysis on live endpoints.

Output speed — higher is better
Anthropic: Claude Opus 585 tok/s
OpenAI: GPT-5 Nano250 tok/s
Latency (TTFT) — lower is better
Anthropic: Claude Opus 51,200 ms
OpenAI: GPT-5 Nano350 ms
MetricAnthropic: Claude Opus 5OpenAI: GPT-5 Nano
Cost per task$0.000025$0.000001

Provider

Infrastructure metrics for the organizations behind these models.

MetricAnthropicOpenAI
Listed endpoints812
Reliability99.8%99.9%
Avg latency520 ms450 ms
Pricing tiersstandard, batchstandard, batch, provisioned

Full details: Anthropic: Claude Opus 5 pricing · OpenAI: GPT-5 Nano pricing