Back to Text & reasoning
Model comparison
Gemini 4 Carbon vs Claude Opus 5.5
Compare Gemini 4 Carbon and Claude Opus 5.5 using the same provider-sourced text & reasoning rubric. No mystery score and no invented benchmark ranking.
Estimate your cost
Set your usage. Your estimate updates as you type.
Example: 6,000 input tokens for 10 pages, plus a 500-token summary. Page lengths vary; adjust the numbers below.
One run sends your input to the model once and receives an answer. Tokens are pieces of text: input is what you send, output is the answer you receive.
Advanced options
How this estimate works
Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.
| Model | Access | Estimated total (USD) |
|---|---|---|
| Claude Opus 5.5Anthropic | Anthropic | $0.034 |
| Gemini 4 CarbonGoogle | No reviewed rate |
Quick take
Gemini 4 Carbon
A Google model for complex software engineering and cybersecurity defense, initially available to selected trusted partners.
Best for
- Complex software engineering
- Authorized security research
- Code review and patching
Watch out for
Access is restricted. Announced prices do not establish public API availability.
Claude Opus 5.5
A Claude model for large code changes, detailed research and business tasks that take many steps.
Best for
- Codebase changes
- Multi-step workflows
Watch out for
Existing integrations need a compatibility check: thinking cannot be disabled and forced tool calls are not supported. Fast mode and batch processing have different prices.
Compare the published facts
Gemini 4 Carbon vs Claude Opus 5.5
Values use each provider's own published units and limits. A blank means the provider did not publish a directly comparable value in the sources reviewed.
| Text & reasoning | Gemini 4 Carbon | Claude Opus 5.5 |
|---|---|---|
| Context windowMaximum combined prompt and working context documented by the provider. | Not published | 1M tokens |
| Maximum outputProvider-published response limit, where available. | Not published | 128K tokens |
| Knowledge cutoffLatest reliable knowledge date explicitly published by the model provider. Search and connected tools can retrieve newer information but do not change the model's built-in cutoff. | Not published | June 2026 |
| Input priceCurrent standard list price per million input tokens unless noted. | $2 / 1M introductory; $4 afterward | $4 / 1M |
| Output priceCurrent standard list price per million output tokens unless noted. | $10 / 1M introductory; $20 afterward | $20 / 1M |
| InputsMedia types accepted by the listed model endpoint. | Text; other formats not published | Text, image |
| Tools & agentsSelected native tools and agent-building capabilities, not an exhaustive list. | API tool support not published | Tool use, agents, vision, coding workflows |
How to choose
Compare the job, not the hype.
Start with the job you need to complete, then validate cost, access, and policy details on your exact provider route.
Gemini 4 Carbon
Carbon-specific retention and training terms are not published. Confirm the terms of approved access with Google.
Provider and API links
Claude Opus 5.5
Anthropic does not train on API data without express permission. Retention depends on the API feature, account agreement and cloud provider.
Provider and API links
Frequently asked questions
Gemini 4 Carbon vs Claude Opus 5.5 FAQ
What is the main difference between Gemini 4 Carbon and Claude Opus 5.5?
Gemini 4 Carbon: A Google model for complex software engineering and cybersecurity defense, initially available to selected trusted partners. Claude Opus 5.5: A Claude model for large code changes, detailed research and business tasks that take many steps.
Should I choose Gemini 4 Carbon or Claude Opus 5.5?
Consider Gemini 4 Carbon when your priority is Complex software engineering. Consider Claude Opus 5.5 when your priority is Codebase changes. Test both with your own data and provider route before committing.
Is this Gemini 4 Carbon vs Claude Opus 5.5 comparison based on Cody benchmarks?
No. This comparison aligns provider-published facts for the Text & reasoning category. It does not claim a universal winner or combine incompatible third-party benchmark scores.