Accounts Fireworks Models Glm 4p5 Air vs DeepSeek DeepSeek Chat v3.1
Accounts Fireworks Models Glm 4p5 Air (Fireworks AI, 128,000-token context) versus DeepSeek DeepSeek Chat v3.1 (OpenRouter, 163,840-token context). DeepSeek DeepSeek Chat v3.1 is cheaper by 9% on a blended token mix. Accounts Fireworks Models Glm 4p5 Air uniquely supports structured output (json schema). DeepSeek DeepSeek Chat v3.1 uniquely supports prompt caching. Use the live calculator below to plug your real usage shape into both, then route the winner via Agent Command Center for shadow A/B without code changes.
Bottom line — Accounts Fireworks Models Glm 4p5 Air vs DeepSeek DeepSeek Chat v3.1
Accounts Fireworks Models Glm 4p5 Air and DeepSeek DeepSeek Chat v3.1 are priced within 9% of each other, so cost alone is not the deciding factor. The comparison comes down to capabilities, context window, and benchmark performance on the specific task shape your workload demands.
On capability surface area, the models diverge: Accounts Fireworks Models Glm 4p5 Air supports structured output (json schema) where the other does not; DeepSeek DeepSeek Chat v3.1 supports prompt caching where the other does not. These differences are binary — either your workload needs the capability or it does not. Check whether any critical path in your agent pipeline depends on a capability only one model provides before committing to a migration.
For teams evaluating both models, the recommended path is a shadow A/B test: route production traffic through an OpenAI-compatible gateway, mirror a percentage to the candidate model, score both responses with an automated evaluator (faithfulness, tool-call correctness, latency), and compare cohort-level metrics over two weeks. Future AGI Agent Command Center supports this pattern with a single `base_url` change and built-in evaluators from the ai-evaluation SDK.
Live workload comparison
Same workload run through both models. The cheaper one is highlighted.
strategy: cost-optimized
primary:
model: deepseek-deepseek-chat-v3-1
provider: openrouter
fallback:
model: accounts-fireworks-models-glm-4p5-air
provider: fireworks-ai
shadow: { sample_rate: 0.05 } # mirror 5% of traffic to compare quality live| Accounts Fireworks Models Glm 4p5 Air | DeepSeek DeepSeek Chat v3.1 | |
|---|---|---|
| Input price | $0.220/M | $0.200/M |
| Output price | $0.880/M | $0.800/M |
| Context window | 128,000 | 163,840 |
| Max output | 96,000 | 163,840 |
| Function calling | ✓ | ✓ |
| Vision | — | — |
| Audio input | — | — |
| Reasoning | ✓ | ✓ |
| Prompt caching | — | ✓ |
| Structured output | ✓ | — |
| Pricing verified | Aug 6, 2026 | Aug 6, 2026 |
Cost at scale: monthly spend at three usage volumes
Estimated monthly cost assuming 1,000 input + 200 output tokens per request — a realistic chat-agent shape. Adjust your own usage in the calculator at the top of this page for an exact number.
| Scale | Accounts Fireworks Models Glm 4p5 Air | DeepSeek DeepSeek Chat v3.1 | Delta |
|---|---|---|---|
| Startup 10K requests/day | $119 /mo | $108 /mo | $10.80/mo |
| Mid-market 100K requests/day | $1,188 /mo | $1,080 /mo | $108/mo |
| Enterprise 1M requests/day | $11,880 /mo | $10,800 /mo | $1,080/mo |
At enterprise scale (1M requests/day), a difference of even ~10% in unit price compounds into thousands of dollars per month. Cached input pricing and batch tiers can shift this further — both are surfaced on each model's own page.
When to choose which
Picked from the data above — not vendor marketing. Match the rules to your workload, not the other way around.
You re-send the same large system prompt across requests — DeepSeek DeepSeek Chat v3.1 supports prompt caching, cutting input cost on repeat hits.
Capability diff — what you gain and lose on the swap
A specific list of what each model has that the other doesn't. If your workload depends on a row in Only Accounts Fireworks Models Glm 4p5 Air, switching to DeepSeek DeepSeek Chat v3.1 means re-architecting that path (and vice versa).
- • Structured output (JSON schema)
- • Prompt caching
Capabilities both share (3)
- ✓ Function calling
- ✓ Streaming
- ✓ Native reasoning mode
Migration considerations
Concrete differences to wire through your stack before you flip traffic from one to the other.
- Max output tokens differ: 96,000 on Accounts Fireworks Models Glm 4p5 Air vs 163,840 on DeepSeek DeepSeek Chat v3.1. Long-form generation tasks may truncate differently — adjust streaming UI and chunking accordingly.
- Accounts Fireworks Models Glm 4p5 Air has capabilities DeepSeek DeepSeek Chat v3.1 lacks: Structured output (JSON schema). Switching to DeepSeek DeepSeek Chat v3.1 means re-architecting any flow that depends on these.
- DeepSeek DeepSeek Chat v3.1 has capabilities Accounts Fireworks Models Glm 4p5 Air lacks: Prompt caching. Worth wiring through the agent design before commit.
- Provider changes from Fireworks AI to OpenRouter. API authentication, rate-limit policy, regional availability, and billing all shift. Most teams route through an OpenAI-compatible gateway (e.g., Future AGI Agent Command Center) so the swap is a single `base_url` change instead of an SDK rewrite.
How to A/B test Accounts Fireworks Models Glm 4p5 Air vs DeepSeek DeepSeek Chat v3.1 in production
If you're stuck between the two, run them side-by-side on real traffic. Four steps the Future AGI team uses internally:
- 1. Point your existing OpenAI SDK at
https://gateway.futureagi.com/v1. No code change beyondbase_urland a virtual key. - 2. Mark Accounts Fireworks Models Glm 4p5 Air primary, mirror 20% of traffic to DeepSeek DeepSeek Chat v3.1 in shadow mode. Both responses are logged; only the primary is served to users.
- 3. Score every shadow response with an evaluator — faithfulness, tool-call correctness, response latency, cost. Built-in evaluators in ai-evaluation cover the common axes.
- 4. Compare cohort-level metrics after two weeks. Switch primary when the candidate wins on what matters to your workload — and stays within your latency budget.
Full walkthrough on the Agent Command Center page.
FAQ — Accounts Fireworks Models Glm 4p5 Air vs DeepSeek DeepSeek Chat v3.1
Which is cheaper, Accounts Fireworks Models Glm 4p5 Air or DeepSeek DeepSeek Chat v3.1? ▾
DeepSeek DeepSeek Chat v3.1 is cheaper by roughly 9% on a blended input + output token mix. Input prices are $0.220/M for Accounts Fireworks Models Glm 4p5 Air versus $0.200/M for DeepSeek DeepSeek Chat v3.1; output prices are $0.880/M versus $0.800/M. The exact savings depend on your input:output ratio — use the live calculator above to plug in your own request shape.
What is the context window of Accounts Fireworks Models Glm 4p5 Air versus DeepSeek DeepSeek Chat v3.1? ▾
Accounts Fireworks Models Glm 4p5 Air supports up to 128,000 tokens of context. DeepSeek DeepSeek Chat v3.1 supports up to 163,840 tokens. DeepSeek DeepSeek Chat v3.1 has the larger window by a factor of 1.3x, which matters for long-document RAG, multi-turn agent sessions, and tasks that need to keep an entire codebase in working memory.
Do Accounts Fireworks Models Glm 4p5 Air and DeepSeek DeepSeek Chat v3.1 both support tool calling? ▾
Yes — both Accounts Fireworks Models Glm 4p5 Air and DeepSeek DeepSeek Chat v3.1 support native function calling. Both also support structured output via JSON schema, so an agent can be ported between them with the same tool definitions.
Which model supports prompt caching for cost reduction? ▾
DeepSeek DeepSeek Chat v3.1 supports prompt caching; the other does not. If your agent has a stable system prompt + retrieval context block that repeats across requests, DeepSeek DeepSeek Chat v3.1 gives you a 50–90% discount on those repeated input tokens at the provider level.
How do I A/B test Accounts Fireworks Models Glm 4p5 Air against DeepSeek DeepSeek Chat v3.1 in production? ▾
Route both through an OpenAI-compatible gateway like Future AGI Agent Command Center with shadow mode enabled. Send 100% of traffic to your primary model, mirror 10–20% to the candidate, score every response with an evaluator (faithfulness, tool-call correctness, response time), and compare cohort-level metrics for two weeks. Switch when the candidate wins on the metrics that matter to your workload and stays within your latency budget.