Claude Opus 4.5vsGPT-5.4
Six criteria, two tools, one clear verdict to pick the assistants tool that truly fits your workflow.
At a glance
Trying to choose between Claude Opus 4.5 and GPT-5.4? Both tools rank among the most popular in the assistants category, and the right pick depends on your specific needs, budget and technical requirements. In this comparison, we score both solutions across six key criteria on a 10-point scale for an objective, transparent breakdown.
Scores by criterion
Average score
Detailed breakdown
Output quality
On the output quality criterion, Claude Opus 4.5 and GPT-5.4 are neck and neck (9.9/10 each). The decision will come down to other criteria based on your use case.
Pricing
On the pricing criterion, Claude Opus 4.5 takes the lead (7.5/10 vs 7.0/10 for GPT-5.4). A factor to keep in mind if this criterion is critical to your decision.
Ease of use
On the ease of use criterion, Claude Opus 4.5 and GPT-5.4 are neck and neck (9.5/10 each). The decision will come down to other criteria based on your use case.
Integrations
On the integrations criterion, GPT-5.4 takes the lead (9.0/10 vs 6.0/10 for Claude Opus 4.5). A factor to keep in mind if this criterion is critical to your decision.
French support
On the french support criterion, Claude Opus 4.5 and GPT-5.4 are neck and neck (9.0/10 each). The decision will come down to other criteria based on your use case.
Accessibility
On the accessibility criterion, Claude Opus 4.5 and GPT-5.4 are neck and neck (7.5/10 each). The decision will come down to other criteria based on your use case.
Tools overview
Claude Opus 4.5
Claude Opus 4.5 is an AI tool for code generation and faster writing.
- Pricing
- Dès 20 $/mois (Pro) + API 5 $/25 $ par MTok
- Starts at
- 20 USD/month
- Free trial
- Yes
- French
- Yes
- API
- No
Strengths
- Strong code generation workflows with quick i
- Useful presets and templates for repeatable r
- Good quality for common tasks with quick iter
- Helps reduce manual editing time with smart r
- Easy to adopt for teams and non-technical use
Weaknesses
- Output quality depends on inputs and needs hu
- Advanced exports and team features may requir
- Less suitable for highly regulated or sensiti
- Can feel generic without strong guidance and
GPT-5.4
OpenAI's frontier model combining reasoning, coding and native computer-use with a 1M-token context.
- Pricing
- Gratuit / À partir de 20$/mois (ChatGPT Plus)
- Starts at
- 20 USD/month
- Free trial
- Yes
- French
- No
- API
- Yes
Strengths
- 1M-token context
- Computer-use
- Top code & agents
- Fewer errors
- Multiple variants
Weaknesses
- Pro is premium
- API cost
- Thinking latency
- Usage policies
Who are these tools for?
Choose Claude Opus 4.5 if…
- Developers generating code and prototypes
- SMBs improving day-to-day productivity
- Marketing teams iterating on messaging
- Non-native writers improving clarity
Choose GPT-5.4 if…
- Developers building coding agents
- Advanced product and data teams
- Startups embedding AI agents
- Pros demanding strong reasoning
- Researchers and analytical consultants
Our verdict
GPT-5.4 takes the lead (+0.5 pts)
GPT-5.4 takes the lead over Claude Opus 4.5 (8.7/10 vs 8.2/10) in the assistants category. That said, Claude Opus 4.5 remains relevant for specific use cases detailed above. Try both via their free trial to confirm which best fits your needs.
Frequently asked questions
Is Claude Opus 4.5 better than GPT-5.4 in 2026?
Across our six criteria, Claude Opus 4.5 scores 8.2/10 versus 8.7/10 for GPT-5.4. Yet the best choice still depends on your priority criteria — see the detailed analysis above.
Can I use Claude Opus 4.5 and GPT-5.4 together?
Yes, many professionals combine both tools to leverage their respective strengths. Combined usage may require manual transfers between the two interfaces.
What's an alternative to Claude Opus 4.5 and GPT-5.4?
The assistants space offers many alternatives. Visit our comparisons page to discover all tools in the category, or browse our full directory of 400+ AI tools sorted by use case and rating.
Related reads