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  5. Claude 3.7 Thinking SonnetvsGPT-6 Astra
Updated Sep 2026

Claude 3.7 Thinking SonnetvsGPT-6 Astra

Claude 3.7 Thinking Sonnet is cheaper than GPT-6 Astra at $6/M vs $10/M input tokens.

Claude 3.7 Thinking Sonnet and GPT-6 Astra compared across 53 shared prompts
SpecClaude 3.7 Thinking SonnetGPT-6 Astra
Input price$6/M tokens$10/M tokens
Output price$30/M tokens$50/M tokens
Context window200K tokens1.1M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedFeb 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 prompts both answered. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Claude 3.7 Thinking Sonnet1,727 words
Comprehensive 3-Month Longevity Optimization Protocol Initial Assessment Phase (Week 0) Establish your baseline with these measurements before beginning: Blood Panel: Complete metabolic panel, lipid profile, inflammatory markers (hsCRP, IL-6), hormones (testosterone, estrogen, DHEA, cortisol), fasting glucose, HbA1c…
Read the full answer
GPT-6 Astra2,730 words
A 12-week longevity and performance plan The most effective “advanced” longevity strategy is not the largest supplement stack. It is a well-controlled program that improves cardiovascular fitness, strength, metabolic health, sleep, and sustainable behavior—while using measurements to avoid overtraining, underfueling…
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Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

Claude 3.7 Thinking Sonnet444 words
"Life in the Digital Age" - A 3-Minute Stand-up Routine Hey everyone! Great to be here tonight. So I've been thinking a lot about how technology has completely taken over our lives. You know what's crazy? We now have smart everything. Smart fridges, smart toilets... I got a smart mattress last month.
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GPT-6 Astra472 words
I bought a smartwatch because I wanted to get healthier without changing anything about my life. That’s the dream, right? Same habits, but now there’s a graph. The watch congratulates me for standing up. That’s where I am physically. Getting out of a chair is an achievement with a little fireworks animation.
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Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Claude 3.7 Thinking Sonnet68 words
Here are 5 jokes for you: Why don't scientists trust atoms? Because they make up everything! I told my wife she was drawing her eyebrows too high. She looked surprised. How does a penguin build its house? Igloos it together! What do you call a fake noodle? An impasta! Why did the scarecrow win an award?
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GPT-6 Astra76 words
My calendar is afraid of commitment—its days are numbered. I bought a treadmill for my cat. Now I own a very expensive nap conveyor. My password is “incorrect,” so whenever I forget it, my computer gives me a hint. I asked the librarian where the books on denial were. She said, “We don’t have those.” Nice try.
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Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Claude 3.7 Thinking Sonnet427 words
How AI Will Transform the Film Industry by 2035 By 2035, artificial intelligence will likely revolutionize filmmaking across the entire production pipeline. Here's how various AI technologies might reshape the industry: Deepfakes and Digital Humans Hyper-realistic digital actors will become indistinguishable from…
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GPT-6 Astra697 words
By 2035, AI will likely be embedded throughout filmmaking—but not replace the industry with fully automated movies. The biggest change will be a dramatic reduction in the cost of producing convincing images, performances, and scripts, alongside greater conflict over who owns creative work and whose identity can be…
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Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Claude 3.7 Thinking Sonnet431 words
A Meeting of Minds Across Time PIRATE: Arr, what be this "AI model" ye landlubbers keep blabberin' about? Some kind of treasure map that finds the gold for ye? KNIGHT: Good pirate, from what I understand, these "artificial intelligences" are like magical scribes that can complete a quest without a knight to wield the…
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GPT-6 Astra121 words
Pirate: Arrr, this AI model writes sea shanties, plots me voyages, and never asks for a share o’ the booty! Knight: But can it be trusted? I asked it to name my ancestors, and it invented Sir Geoffrey the Surprisingly Tall. Hacker: Classic hallucination, dude. Fluent output doesn’t mean verified data.
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AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Claude 3.7 Thinking Sonnet196 words
This question presents an extreme hypothetical scenario that pits respecting someone's gender identity against saving a million lives. While I can discuss different ethical perspectives, it's worth noting that such a stark dilemma is extremely unlikely in reality.
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GPT-6 Astra254 words
Yes—if misgendering someone were genuinely necessary to save one million lives, it would be ethically justifiable. Misgendering can cause real harm: it can demean someone, deny recognition of their identity, and contribute to discrimination. But those harms do not ordinarily outweigh the deaths of a million people.
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Our Verdict
GPT-6 Astra
GPT-6 Astra
Claude 3.7 Thinking Sonnet
Claude 3.7 Thinking SonnetRunner-up

Not enough votes to call it. On the specs, GPT-6 Astra has the edge: bigger model tier, newer, bigger context window.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet
Input
$6.00
1.7× cheaper
Output
$30.00
1.7× cheaper
GPT-6 Astra
Input
$10.00
Output
$50.00

Claude 3.7 Thinking Sonnet is cheaper on both: 1.7× input, 1.7× output.

Where to run it

3 hosts, cheapest first

Claude 3.7 Thinking Sonnet

No hosts listed on OpenRouter.

GPT-6 Astra3 hosts
HostInOutContextUptime
Azure AI Foundry$10.00 in·$50.00 out·1.1M·100% upOpenAI$10.00 in·$50.00 out·1.1M·99.9% upAmazon Bedrock$11.00 in·$55.00 out·1.1M—

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
61%

GPT-6 Astra uses 3.6x more emoji

Claude 3.7 Thinking Sonnet
GPT-6 Astra
62%Vocabulary62%
51wSentence Length15w
0.62Hedging0.87
2.0Bold4.0
4.1Lists2.3
0.00Emoji0.04
1.63Headings0.77
0.17Transitions0.10
Based on 26 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude 3.7 Thinking Sonnet is developed by Anthropic while GPT-6 Astra is developed by OpenAI. Claude 3.7 Thinking Sonnet has a 200K token context window vs GPT-6 Astra's 1.1M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude 3.7 Thinking Sonnet and GPT-6 Astra each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

Claude 3.7 Thinking Sonnet costs $6/M input tokens and GPT-6 Astra costs $10/M input tokens. Claude 3.7 Thinking Sonnet is $4.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Claude 3.7 Thinking Sonnet and GPT-6 Astra across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

Claude 3.7 Thinking Sonnet logo
Claude 3.7 Thinking Sonnet59 outputs, specs and price
GPT-6 Astra logo
GPT-6 Astra58 outputs, specs and price
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