Head-to-head · Anthropic vs Google
Claude Opus 5.5 vs Gemini 3.8 Flash
Quick answer: Claude Opus 5.5 stands out for matches Claude Fable 5.1 on most work at a much lower price. Gemini 3.8 Flash stands out for strong quality for a fast, low-cost model. Reviewed September 2026.
Overview
Claude Opus 5.5: Claude Opus 5.5, released on 22 September 2026, is Anthropic's newest Opus model. Anthropic reports it performs at the level of Claude Fable 5.1 on most work while costing about 40% less to run than Opus 5, with a focus on agentic coding, computer use and knowledge work.
Gemini 3.8 Flash: Gemini 3.8 Flash, released on 2 September 2026, is Google's newest Flash model, aimed at long-horizon engineering and agent tasks. It is priced at $0.75 and $3.75 per million tokens, a rate Google lists through 31 December 2026, after which it rises to $1.50 and $7.50.
At a glance
| Dimension | Claude Opus 5.5 | Gemini 3.8 Flash |
|---|---|---|
| Vendor | Anthropic | |
| Starting price | API: $4 in / $20 out per M tokens | API: $0.75 in / $3.75 out per M tokens |
| Pricing model | Paid | Paid |
| Free tier | No | No |
| Category | Generative AI | Generative AI |
Strengths and limits
Claude Opus 5.5
- Matches Claude Fable 5.1 on most work at a much lower price
- Faster output than Opus 5
- Strong on coding and knowledge work such as financial analysis
Watch out for
- Newest release, so fewer independent long-term evaluations
- Output still costs $20 per million tokens
- Sonnet or Haiku are cheaper for routine tasks
Gemini 3.8 Flash
- Strong quality for a fast, low-cost model
- Well suited to agentic and coding workflows
- Backed by Google's multimodal stack
Watch out for
- Listed price applies through 31 December 2026
- Below Pro-tier models on the hardest reasoning
- Very new, so limited independent evaluations
Key features
Claude Opus 5.5
- 1M-token context window at standard pricing
- Agentic coding, code review and bug detection
- Computer use and complex multi-step tasks
- Clearer, more direct communication style
- Available in Claude apps, the API, Claude Code, AWS, Google Cloud and Microsoft Azure
Gemini 3.8 Flash
- Latest Flash-tier Gemini model
- Built for agents and long-horizon engineering tasks
- Low per-token price
- Available through the Gemini API
Pricing compared
Claude Opus 5.5 is priced by usage rather than by seat: API: $4 in / $20 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Gemini 3.8 Flash is priced by usage rather than by seat: API: $0.75 in / $3.75 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Profession-fit verdict
8 roles where both tools are recommended. A higher relevance score means a better fit for that job.
| Profession | Claude Opus 5.5 score | Gemini 3.8 Flash score |
|---|---|---|
| Nurse | 9/10 | 7/10 |
| Doctor | 9/10 | 7/10 |
| Dentist | 9/10 | 7/10 |
| Pharmacist | 9/10 | 7/10 |
| Physical Therapist | 9/10 | 7/10 |
| Mental Health Counselor | 9/10 | 7/10 |
| Veterinarian | 9/10 | 7/10 |
| Medical Coder | 9/10 | 7/10 |
Frequently asked questions
Which is better, Claude Opus 5.5 or Gemini 3.8 Flash?
It depends on the work. Claude Opus 5.5 stands out for matches Claude Fable 5.1 on most work at a much lower price. Gemini 3.8 Flash stands out for strong quality for a fast, low-cost model. Across 8 professions where both are rated, Claude Opus 5.5 ranks higher more often (8 roles).
How do Claude Opus 5.5 and Gemini 3.8 Flash compare on price?
Claude Opus 5.5 is priced by usage rather than by seat: API: $4 in / $20 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing. Gemini 3.8 Flash is priced by usage rather than by seat: API: $0.75 in / $3.75 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Is there a free option between Claude Opus 5.5 and Gemini 3.8 Flash?
Neither lists a permanent free tier. Look for trials or usage-based pricing to test on real work first.