Inference Labs › Compare models › GPT-5 vs Gemini 2.5 Pro
GPT-5 vs Gemini 2.5 Pro
Side-by-side comparison of GPT-5 and Gemini 2.5 Pro: per-token pricing, context windows, strengths, and which to pick for production workloads.
GPT-5
Strengths
- Strongest reasoning across math, code, and complex multi-step tasks.
- Native multimodal input.
- Lower hallucination rate than GPT-4 generation.
Trade-offs
- More expensive than peers.
- Slower per-token than 'mini' tier models.
Gemini 2.5 Pro
Strengths
- 2M token context.
- Strong multimodal (image + video understanding).
- Native Google Search grounding for factuality.
Trade-offs
- Tool-use traces less detailed than Claude.
- Provider lock-in pulls workloads onto Google Cloud.
Side-by-side pricing
| Metric | GPT-5 | Gemini 2.5 Pro |
|---|---|---|
| Input price ($/1M tokens) | $1.25 | $1.25 |
| Output price ($/1M tokens) | $10.00 | $10.00 |
| Context window | 400K tokens | 2,000K tokens |
| Cost for 1M in + 1M out | $11.25 | $11.25 |
| Tier | premium | premium |
Which should you pick?
Gemini 2.5 Pro is cheaper per 1M input tokens; Gemini 2.5 Pro is cheaper on output. For high-output workloads (long generation, structured extraction), the output rate dominates.
For long-context use cases, Gemini 2.5 Pro has the larger window (2,000K vs 400K).
In practice, the right answer depends on your traffic mix. Inference Labs lets you route the same request to whichever of these two is best for that prompt -- using policy you define (quality-first, cost-first, latency-first) without changing your application code.
Route between them automatically
Inference Labs is a vendor-neutral router that sits in front of GPT-5, Gemini 2.5 Pro, and the other major cloud LLMs. Set per-request policy (max cost, max latency, required quality tier) and the router picks the best model per call. You keep your existing provider accounts -- we just orchestrate.
- Allowlist only the models your team has approved.
- Automatic failover if one provider is degraded.
- Semantic + exact-hash cache reduces redundant calls.
- Per-workspace spend caps and audit-ready trace logs.
Stop hard-coding model names. Start a free Inference Labs trial → -- 500 credits, no card required, see your routing decisions in the dashboard within minutes.