🔥 Limited time: Pro lifetime access $19 — price goes up July 12 →
Claude Opus 4.8 vs Gemini 3.1 Pro
Premium vs mid-tier: Opus 4.8 at $5/$25 vs Gemini 3.1 Pro at $2/$12. Gemini 3.1 Pro is 60% cheaper on input, 52% cheaper on output — same 1M context window. Save up to $210/month at scale.
Pricing data verified: Jul 3, 2026
| Specification | Claude Opus 4.8 (Anthropic) | Gemini 3.1 Pro (Google) |
|---|---|---|
| Input Price (per 1M tokens) | $5.00 | $2.00 |
| Output Price (per 1M tokens) | $25.00 | $12.00 |
| Context Window | 1M tokens | 1M tokens |
| Tier | Premium | Mid |
| Provider | Anthropic |
Calculate Your Exact Savings
Gemini 3.1 Pro is dramatically cheaper on both input and output. See exactly how much you save at your usage level.
Other Mid-Tier Models
Which Model for Which Use Case?
Code Generation
Opus 4.8 ($5/$25) is Anthropic's premium coding model with top-tier code generation, debugging, and refactoring. Gemini 3.1 Pro ($2/$12) offers strong coding at 60% less input cost. For most coding tasks, Gemini 3.1 Pro delivers excellent results at a fraction of the cost.
Content Generation
Blog posts, marketing copy, documentation. Opus 4.8 at $25/1M output vs Gemini 3.1 Pro at $12/1M output means Gemini saves 52% on every output token. For high-volume content generation, this compounds to massive monthly savings.
Long-Context Processing
Both models have 1M token context windows — identical capacity for long documents, large codebases, and extended conversations. Neither has an advantage for context length. Pick based on price and quality preferences.
High-Volume Batch Processing
At scale, Gemini 3.1 Pro's savings compound dramatically. At 10M input + 10M output tokens/month, Gemini 3.1 Pro costs $140 vs Opus 4.8's $300 — saving $160/month. For batch workloads, Gemini 3.1 Pro delivers strong results at less than half the cost.
Comparing premium and mid-tier models?
APIpulse Pro lets you compare all 49 models including Opus 4.8 ($5/$25) and Gemini 3.1 Pro ($2/$12), save scenarios, and export cost reports for your team.
Frequently Asked Questions
How much cheaper is Gemini 3.1 Pro than Claude Opus 4.8?
Gemini 3.1 Pro costs $2.00/$12.00 per 1M tokens while Claude Opus 4.8 costs $5.00/$25.00 per 1M tokens. Gemini 3.1 Pro is 60% cheaper on input and 52% cheaper on output. At 1M input + 1M output tokens/month, Gemini 3.1 Pro costs $14 vs Opus 4.8's $30, saving $16/month. At 10M input + 10M output, savings reach $210/month. The input price difference is even larger — 60% cheaper — making Gemini 3.1 Pro exceptionally cost-effective for input-heavy workloads.
Which model has a larger context window?
Both Claude Opus 4.8 and Gemini 3.1 Pro have identical 1M token context windows. Neither has an advantage for long-document processing. Both handle extremely long documents, large codebases, and extended conversation histories with ease. Context window is not a differentiator between these two models.
Is Gemini 3.1 Pro good enough to replace Claude Opus 4.8?
Gemini 3.1 Pro at $2/$12 is a strong mid-tier model that handles most tasks well — code generation, content creation, analysis, and chatbot applications. Claude Opus 4.8 at $5/$25 is a premium model with potentially stronger reasoning and safety alignment. For cost-sensitive workloads where 80-90% of the quality is acceptable, Gemini 3.1 Pro offers dramatically better value. For mission-critical tasks requiring the highest quality, Opus 4.8 may justify its 2.5x premium on input and 2.1x premium on output.
When should I choose Claude Opus 4.8 over Gemini 3.1 Pro?
Choose Claude Opus 4.8 ($5/$25) for mission-critical tasks requiring the highest quality reasoning, Anthropic's safety-focused approach, or when output quality directly impacts your product. Choose Gemini 3.1 Pro ($2/$12) for cost-sensitive workloads, high-volume batch processing, or when you need 60% cheaper input costs and 52% cheaper output costs with acceptable quality. Both have identical 1M context windows.
Are both models in the same pricing tier?
No. Claude Opus 4.8 is in the Premium tier ($5/$25) while Gemini 3.1 Pro is in the Mid tier ($2/$12). Opus 4.8 is 2.5x more expensive on input and 2.1x more expensive on output. The tier difference reflects the intended use cases — Opus 4.8 for premium tasks requiring top quality, Gemini 3.1 Pro for cost-effective mid-tier workloads. Both share identical 1M context windows.
Related Comparisons
Stop guessing — get exact costs for every model
Pro gives you 49-model comparison, migration code snippets, PDF reports, and personalized optimization tips.
Get Pro — $19 (monitor + save)✅ 14-day money-back guarantee · ⚡ Instant access · 🔒 One-time payment