Claude Opus 4.5 (latest) vs GPT-6 Astra Pro
Prices checked
Claude Opus 4.5 (latest) and GPT-6 Astra Pro split the 5 rounds this table counts: the maker's two prices, the cheapest price, the maker's blended price and context. The weighting you pick decides the rest.
AnthropicClaude Opus 4.5 (latest)
200k context · tool calling · reads images
$8.59/M tokensCheapest price, at Poe · $3.86 per 1,000 pages
OpenAIGPT-6 Astra Pro
1.1M context · tool calling · reads images
$10/M tokensOpenAI's own price · $4.50 per 1,000 pages
Maker's price in (lower wins)
$5/M
$5/M
Maker's price out (lower wins)
$25/M
$25/M
Cheapest price (lower wins)
$8.59/M at Poe
none below the maker
Maker's price, blended (lower wins)
$10/M
$10/M
Cost per 1,000 pages (lower wins)
$3.86
$4.50
Context
200k tokens
1.1M tokens
Open weights
no
not published
Tool calling
yes
yes
Structured output
yes
yes
Reads images
yes
yes
Reasoning
yes
yes
Released
24 Nov 2025
4 Sept 2026
Providers selling it
42
7
Price we measure against
the maker's own
the maker's own
Trains on your prompts (no is better)
not published
no provider to check
Providers selling both · 5
Azure AI Foundry$10 / $20
Kilo Gateway$10 / $20
NanoGPT$10 / $20
Nous Portal$10 / $20
OpenRouter$10 / $20
Claude Opus 4.5 (latest), then GPT-6 Astra Pro, per million tokens.
Go further
Add a third or fourth model, or change the weighting, in the tool.
Frequently asked
- Which is cheaper, Claude Opus 4.5 (latest) or GPT-6 Astra Pro?
- Claude Opus 4.5 (latest), at $8.59 per million tokens against $10 for GPT-6 Astra Pro, blended 3 in : 1 out, read on 31 Oct 2026.
- Where is each one cheapest?
- Claude Opus 4.5 (latest): $8.59 at Poe. GPT-6 Astra Pro: nobody sells it below the maker's own price with a stated reason, so $10 is the number to beat.
- Can I buy both from one provider?
- Yes. 5 providers sell both: Azure AI Foundry, Kilo Gateway, NanoGPT, Nous Portal, OpenRouter. The cheapest of them for the two together is Azure AI Foundry.
- Which holds more context?
- GPT-6 Astra Pro, at 1.1M tokens against 200k.
Prices exclude tax, read 31 Oct 2026 from each provider's own catalog. They are per M tokens, blended 3 in : 1 out, and a page is 600 tokens in and 60 out. Bars are scaled to the larger value in each row.
Related comparisons